diff --git a/README.md b/README.md
index b387b50..9f3eeb0 100644
--- a/README.md
+++ b/README.md
@@ -59,7 +59,7 @@ That means users always have a current hostname for VPN, remote access, self-hos
 | Custom domains | TXT challenge verification before hostname creation |
 | Persistence | SQLite with WAL mode |
 | API | FastAPI, OpenAPI, Swagger UI, ReDoc |
-| Auth model | Private magic links for hostnames and custom-domain claims; optional account workspace for dashboards |
+| Auth model | No user accounts. Private bearer links for hostnames and custom-domain claims |
 | Operations | Rate limiting, update logs, cleanup jobs, Docker, Caddy example |
 
 ## Quick Start
diff --git a/router_dyndns/ddns.py b/router_dyndns/ddns.py
index e6d76c0..bb1e2a8 100644
--- a/router_dyndns/ddns.py
+++ b/router_dyndns/ddns.py
@@ -19,10 +19,7 @@ from .ddns_security import (
     client_ip,
     credentials_from_basic_auth,
     is_rate_limited_path,
-    normalize_email,
     require_admin_csrf,
-    set_session_cookie,
-    verify_session_cookie,
 )
 from .ddns_service import DdnsService, normalize_domain, normalize_hostname
 from .ddns_store import DdnsStore
@@ -67,8 +64,6 @@ def make_app(settings: DdnsSettings | None = None) -> FastAPI:
     settings = settings or DdnsSettings.from_env()
     if not settings.admin_password and settings.shared_secret:
         settings = settings.model_copy(update={"admin_password": settings.shared_secret})
-    if not settings.session_secret:
-        settings = settings.model_copy(update={"session_secret": settings.admin_password or settings.shared_secret})
     if settings.require_dns_provider and not dns_backend_configured(settings):
         raise RuntimeError("DDNS_REQUIRE_DNS_PROVIDER is set but no DNS backend is configured")
 
@@ -139,10 +134,6 @@ def make_app(settings: DdnsSettings | None = None) -> FastAPI:
                 headers={"WWW-Authenticate": 'Basic realm="router_dyndns-ddns"'},
             )
 
-    def current_user(request: Request) -> dict[str, str | int] | None:
-        user_id = verify_session_cookie(request.cookies.get("ddns_session"), settings.session_secret)
-        return store.get_user(user_id) if user_id is not None else None
-
     def apply_update(
         request: Request,
         hostname: str,
@@ -157,21 +148,14 @@ def make_app(settings: DdnsSettings | None = None) -> FastAPI:
             return PlainTextResponse("911 dns publish failed", status_code=500)
 
     @app.get("/", response_class=HTMLResponse)
-    def index(request: Request) -> str:
-        user = current_user(request)
-        if user:
-            return _render_user_home(service, settings, user, store.list_accounts(int(user["id"])), None, None, None)
+    def index() -> str:
         return _render_public_home(service, settings, None, None)
 
-    @app.get("/login", response_class=HTMLResponse)
-    def login_page() -> str:
-        return _render_auth_page(settings, None)
-
     @app.post("/magic", response_class=HTMLResponse)
     async def magic_account(request: Request) -> str:
         form = _parse_form(await request.body())
         username = _first_form_value(form, "username") or None
-        account = await run_in_threadpool(service.create_managed_account, username, None)
+        account = await run_in_threadpool(service.create_managed_account, username)
         return _render_public_home(service, settings, account, None)
 
     @app.get("/m/{management_slug}", response_class=HTMLResponse)
@@ -218,53 +202,34 @@ def make_app(settings: DdnsSettings | None = None) -> FastAPI:
 
     @app.post("/request-domain", response_class=HTMLResponse)
     async def request_domain(request: Request) -> str:
-        user = await run_in_threadpool(current_user, request)
         form = _parse_form(await request.body())
         try:
             challenge = await run_in_threadpool(
                 service.create_domain_challenge,
                 _first_form_value(form, "domain"),
-                int(user["id"]) if user else None,
             )
         except sqlite3.IntegrityError as exc:
             raise HTTPException(status_code=409, detail="domain is already verified") from exc
-        if user:
-            return _render_user_home(service, settings, user, store.list_accounts(int(user["id"])), None, None, challenge)
         return _render_public_home(service, settings, None, None, challenge)
 
     @app.post("/verify-domain", response_class=HTMLResponse)
     async def verify_domain(request: Request) -> str:
-        user = await run_in_threadpool(current_user, request)
         form = _parse_form(await request.body())
         domain = normalize_domain(_first_form_value(form, "domain"))
         claim_secret = _first_form_value(form, "claim_secret")
-        owner_user_id = int(user["id"]) if user else None
-        found, challenge = await run_in_threadpool(service.verify_domain, domain, claim_secret, owner_user_id)
+        found, challenge = await run_in_threadpool(service.verify_domain, domain, claim_secret)
         if not found:
             message = "TXT record not found yet. DNS propagation can take a few minutes."
-            if not user:
-                return _render_public_home(service, settings, None, message, challenge)
-            return _render_user_home(
-                service,
-                settings,
-                user,
-                store.list_accounts(int(user["id"])),
-                None,
-                message,
-                challenge,
-            )
-        if not user:
-            return _render_public_home(service, settings, None, "Domain verified. You can now create a hostname under it.", challenge)
-        return _render_user_home(service, settings, user, store.list_accounts(int(user["id"])), None, "Domain verified. You can now create a hostname under it.", challenge)
+            return _render_public_home(service, settings, None, message, challenge)
+        return _render_public_home(service, settings, None, "Domain verified. You can now create a hostname under it.", challenge)
 
     @app.post("/accounts", response_class=HTMLResponse)
     async def self_service_account(request: Request) -> str:
-        user = await run_in_threadpool(current_user, request)
         form = _parse_form(await request.body())
         mode = _first_form_value(form, "mode")
         username = _first_form_value(form, "username") or None
         if mode == "managed":
-            account = await run_in_threadpool(service.create_managed_account, username, int(user["id"]) if user else None)
+            account = await run_in_threadpool(service.create_managed_account, username)
         else:
             claim_secret = _first_form_value(form, "claim_secret")
             account = await run_in_threadpool(
@@ -272,50 +237,12 @@ def make_app(settings: DdnsSettings | None = None) -> FastAPI:
                 _first_form_value(form, "hostname"),
                 claim_secret,
                 username,
-                int(user["id"]) if user else None,
             )
-        if not user:
-            return _render_public_home(service, settings, account, None)
-        return _render_user_home(service, settings, user, store.list_accounts(int(user["id"])), account, None, None)
-
-    @app.post("/register")
-    async def register(request: Request) -> Response:
-        form = _parse_form(await request.body())
-        email = normalize_email(_first_form_value(form, "email"))
-        password = _first_form_value(form, "password")
-        invite = _first_form_value(form, "invite")
-        if not email or len(password) < 12:
-            return HTMLResponse(_render_auth_page(settings, "Use a valid email and a password with at least 12 characters."))
-        try:
-            user = await run_in_threadpool(store.create_user, email, password, invite, settings.require_invite)
-        except (sqlite3.IntegrityError, ValueError):
-            return HTMLResponse(
-                _render_auth_page(settings, "Registration failed. Check the invite code and email address."),
-                status_code=400,
-            )
-        response = RedirectResponse("/", status_code=303)
-        set_session_cookie(response, settings, int(user["id"]))
-        return response
-
-    @app.post("/login")
-    async def login(request: Request) -> Response:
-        form = _parse_form(await request.body())
-        user = await run_in_threadpool(store.authenticate_user, normalize_email(_first_form_value(form, "email")), _first_form_value(form, "password"))
-        if not user:
-            return HTMLResponse(_render_auth_page(settings, "Login failed."), status_code=401)
-        response = RedirectResponse("/", status_code=303)
-        set_session_cookie(response, settings, int(user["id"]))
-        return response
-
-    @app.post("/logout")
-    def logout() -> Response:
-        response = RedirectResponse("/", status_code=303)
-        response.delete_cookie("ddns_session")
-        return response
+        return _render_public_home(service, settings, account, None)
 
     @app.get("/admin", response_class=HTMLResponse)
     def admin(_: None = Depends(authenticate_admin)) -> str:
-        return _render_admin_page(service, settings, store.list_accounts(), store.list_invites(), None)
+        return _render_admin_page(service, settings, store.list_accounts(), None)
 
     @app.post("/admin/accounts")
     async def admin_create_account(request: Request, _: None = Depends(authenticate_admin)) -> Response:
@@ -331,7 +258,7 @@ def make_app(settings: DdnsSettings | None = None) -> FastAPI:
             account = store.create_account(hostname, username)
         except sqlite3.IntegrityError as exc:
             raise HTTPException(status_code=409, detail="hostname already exists") from exc
-        return HTMLResponse(_render_admin_page(service, settings, store.list_accounts(), store.list_invites(), account))
+        return HTMLResponse(_render_admin_page(service, settings, store.list_accounts(), account))
 
     @app.post("/admin/accounts/delete")
     async def admin_delete_account(request: Request, _: None = Depends(authenticate_admin)) -> Response:
@@ -345,13 +272,6 @@ def make_app(settings: DdnsSettings | None = None) -> FastAPI:
                 return PlainTextResponse("DNS delete failed; hostname was not deleted", status_code=500)
         return RedirectResponse("/admin", status_code=303)
 
-    @app.post("/admin/invites")
-    async def create_invite(request: Request, _: None = Depends(authenticate_admin)) -> Response:
-        form = _parse_form(await request.body())
-        require_admin_csrf(settings, _first_form_value(form, "csrf"))
-        store.create_invite()
-        return RedirectResponse("/admin", status_code=303)
-
     @app.get("/records")
     def records(_: None = Depends(authenticate_admin)) -> list[dict[str, str | None]]:
         return store.list_records()
@@ -423,16 +343,6 @@ def _first_form_value(form: dict[str, list[str]], key: str) -> str:
     return form.get(key, [""])[0].strip()
 
 
-def _render_magic_page(
-    service: DdnsService,
-    settings: DdnsSettings,
-    created_account: dict[str, str] | None,
-    message: str | None,
-    challenge: dict[str, str | None] | None = None,
-) -> str:
-    return _render_public_home(service, settings, created_account, message, challenge)
-
-
 def _render_public_home(
     service: DdnsService,
     settings: DdnsSettings,
@@ -490,138 +400,11 @@ def _render_public_home(
     )
 
 
-def _render_user_home(
-    service: DdnsService,
-    settings: DdnsSettings,
-    user: dict[str, str | int],
-    accounts: list[dict[str, str | int | None]],
-    created_account: dict[str, str] | None,
-    message: str | None,
-    challenge: dict[str, str | None] | None = None,
-) -> str:
-    created_html = _credentials_panel(service, created_account)
-    message_html = _message_band(message) if message and not challenge else ""
-    account_rows = "\n".join(_account_row(account, show_owner=False) for account in accounts) or """
-      <tr><td colspan="6" class="empty">No hostnames yet.</td></tr>
-    """
-    return _page(
-        "router-dyndns dashboard",
-        f"""
-        <main>
-          {_top_nav(str(user["email"]), True)}
-          <section class="section">
-            <div class="container page-heading">
-              <p class="eyebrow">Dashboard</p>
-              <h1>Your router hostnames</h1>
-              <p class="lead">Create provider hostnames immediately, or add a domain and verify it with a DNS TXT record.</p>
-            </div>
-          </section>
-          {message_html}
-          {created_html}
-          <section class="section">
-            <div class="container tool-grid">
-              <div>
-                <p class="eyebrow">Provider hostname</p>
-                <h2>Create a random hostname</h2>
-                <p class="section-copy">Best for simple FRITZ!Box setups. The hostname and update link are generated for you.</p>
-              </div>
-              <form method="post" action="/accounts" class="tool-card">
-                <input type="hidden" name="mode" value="managed">
-                <label>Username
-                  <input name="username" placeholder="optional">
-                </label>
-                <button type="submit">Create hostname</button>
-              </form>
-            </div>
-          </section>
-          {_custom_domain_flow(service, challenge, message)}
-          <section class="section">
-            <div class="container">
-              <div class="section-heading">
-                <div>
-                  <p class="eyebrow">Inventory</p>
-                  <h2>Hostnames</h2>
-                </div>
-              </div>
-              <div class="table-wrap">
-                <table>
-                  <thead><tr><th>Domain</th><th>User</th><th>IPv4</th><th>IPv6</th><th>Updated</th><th></th></tr></thead>
-                  <tbody>{account_rows}</tbody>
-                </table>
-              </div>
-            </div>
-          </section>
-        </main>
-        """,
-    )
-
-
-def _render_auth_page(settings: DdnsSettings, message: str | None) -> str:
-    invite_field = """
-      <label>Invite code
-        <input name="invite" autocomplete="off" required>
-      </label>
-    """ if settings.require_invite else ""
-    return _page(
-        "Sign in",
-        f"""
-        <main>
-          {_top_nav()}
-          <section class="hero-band compact">
-            <div class="container hero-inner">
-              <p class="eyebrow">Custom domains</p>
-              <h1>Optional account workspace.</h1>
-              <p class="lead">Most users do not need this. Magic links handle normal hostname and domain setup; accounts are only for people who want a persistent dashboard.</p>
-            </div>
-          </section>
-          {_message_band(message) if message else ""}
-          <section class="section">
-            <div class="container auth-grid">
-              <div class="tool-card">
-                <h2>Login</h2>
-                <form method="post" action="/login" class="stack-form">
-                  <label>Email<input name="email" type="email" autocomplete="email" required></label>
-                  <label>Password<input name="password" type="password" autocomplete="current-password" required></label>
-                  <button type="submit">Login</button>
-                </form>
-              </div>
-              <div class="tool-card secondary-card">
-                <h2>Register</h2>
-                <form method="post" action="/register" class="stack-form">
-                  <label>Email<input name="email" type="email" autocomplete="email" required></label>
-                  <label>Password<input name="password" type="password" autocomplete="new-password" minlength="12" required></label>
-                  {invite_field}
-                  <button type="submit">Create account</button>
-                </form>
-              </div>
-            </div>
-          </section>
-        </main>
-        """,
-    )
-
-
-def _render_public_page(
-    service: DdnsService,
-    settings: DdnsSettings,
-    user: dict[str, str | int] | None,
-    accounts: list[dict[str, str | int | None]],
-    challenge: dict[str, str | None] | None,
-    message: str | None,
-    created_account: dict[str, str] | None = None,
-) -> str:
-    if user:
-        return _render_user_home(service, settings, user, accounts, created_account, message, challenge)
-    return _render_public_home(service, settings, created_account, message, challenge)
-
-
-def _top_nav(label: str | None = None, show_logout: bool = False, links: str = "") -> str:
+def _top_nav(label: str | None = None, links: str = "") -> str:
     account_html = ""
     if label:
         account_html = f'<span class="nav-label">{html.escape(label)}</span>'
-    if show_logout:
-        account_html += '<form method="post" action="/logout"><button class="nav-button" type="submit">Logout</button></form>'
-    elif not links:
+    if not links:
         account_html += '<a class="nav-button" href="/#custom-domain">Domain setup</a>'
     return f"""
     <nav class="top-nav">
@@ -717,10 +500,6 @@ def _custom_domain_flow(service: DdnsService, challenge: dict[str, str | None] |
     """
 
 
-def _challenge_panel(service: DdnsService, challenge: dict[str, str | None] | None, message: str | None) -> str:
-    return _custom_domain_flow(service, challenge, message)
-
-
 def _credentials_panel(service: DdnsService, created_account: dict[str, str] | None) -> str:
     if not created_account:
         return ""
@@ -851,15 +630,11 @@ def _render_admin_page(
     service: DdnsService,
     settings: DdnsSettings,
     accounts: list[dict[str, str | int | None]],
-    invites: list[dict[str, str | None]],
     created_account: dict[str, str] | None,
 ) -> str:
     csrf = html.escape(admin_csrf_token(settings))
-    rows = "\n".join(_account_row(account, show_owner=True, csrf=csrf) for account in accounts) or """
-      <tr><td colspan="7" class="empty">No accounts yet.</td></tr>
-    """
-    invite_rows = "\n".join(_invite_row(invite) for invite in invites) or """
-      <tr><td colspan="3" class="empty">No invites yet.</td></tr>
+    rows = "\n".join(_account_row(account, csrf=csrf) for account in accounts) or """
+      <tr><td colspan="6" class="empty">No accounts yet.</td></tr>
     """
     suffix_help = (
         f"Short names are expanded under {html.escape(settings.hostname_suffix)}."
@@ -870,7 +645,7 @@ def _render_admin_page(
         "DynDNS Admin",
         f"""
         <main>
-          {_top_nav("Operator console", False, '<a href="/records">Records</a><a href="/events">Events</a>')}
+          {_top_nav("Operator console", '<a href="/records">Records</a><a href="/events">Events</a>')}
           <section class="section admin-heading">
             <div class="container">
               <p class="eyebrow">DynDNS aktiv</p>
@@ -902,27 +677,6 @@ def _render_admin_page(
             </div>
           </section>
 
-          <section class="section">
-            <div class="container">
-              <div class="section-heading">
-                <div>
-                  <p class="eyebrow">Invites</p>
-                  <h2>Registration codes</h2>
-                </div>
-                <form method="post" action="/admin/invites">
-                  <input type="hidden" name="csrf" value="{csrf}">
-                  <button type="submit">Create invite</button>
-                </form>
-              </div>
-              <div class="table-wrap">
-                <table>
-                  <thead><tr><th>Code</th><th>Created</th><th>Used</th></tr></thead>
-                  <tbody>{invite_rows}</tbody>
-                </table>
-              </div>
-            </div>
-          </section>
-
           <section class="section">
             <div class="container">
               <div class="section-heading">
@@ -934,7 +688,7 @@ def _render_admin_page(
               <div class="table-wrap">
                 <table>
                   <thead>
-                    <tr><th>Domain</th><th>User</th><th>Owner</th><th>IPv4</th><th>IPv6</th><th>Updated</th><th></th></tr>
+                    <tr><th>Domain</th><th>User</th><th>IPv4</th><th>IPv6</th><th>Updated</th><th></th></tr>
                   </thead>
                   <tbody>{rows}</tbody>
                 </table>
@@ -946,16 +700,15 @@ def _render_admin_page(
     )
 
 
-def _account_row(account: dict[str, str | int | None], show_owner: bool, csrf: str = "") -> str:
+def _account_row(account: dict[str, str | int | None], csrf: str = "") -> str:
     hostname = html.escape(str(account["hostname"]))
     username = html.escape(str(account["username"]))
     ipv4 = html.escape(str(account.get("ipv4") or "-"))
     ipv6 = html.escape(str(account.get("ipv6") or "-"))
     updated = html.escape(str(account.get("updated_at") or "Never"))
-    owner = f"<td>{html.escape(str(account.get('owner_user_id') or '-'))}</td>" if show_owner else ""
     return f"""
       <tr>
-        <td>{hostname}</td><td>{username}</td>{owner}<td>{ipv4}</td><td>{ipv6}</td><td>{updated}</td>
+        <td>{hostname}</td><td>{username}</td><td>{ipv4}</td><td>{ipv6}</td><td>{updated}</td>
         <td>
           <form method="post" action="/admin/accounts/delete">
             <input type="hidden" name="csrf" value="{html.escape(csrf)}">
@@ -967,13 +720,6 @@ def _account_row(account: dict[str, str | int | None], show_owner: bool, csrf: s
     """
 
 
-def _invite_row(invite: dict[str, str | None]) -> str:
-    code = html.escape(str(invite["code"]))
-    created = html.escape(str(invite.get("created_at") or "-"))
-    used = html.escape(str(invite.get("used_at") or "-"))
-    return f"<tr><td><input readonly value=\"{code}\"></td><td>{created}</td><td>{used}</td></tr>"
-
-
 def _page(title: str, body: str) -> str:
     return f"""
     <!doctype html>
diff --git a/router_dyndns/ddns_api.py b/router_dyndns/ddns_api.py
index 0dd25da..a7bed5c 100644
--- a/router_dyndns/ddns_api.py
+++ b/router_dyndns/ddns_api.py
@@ -1,11 +1,10 @@
 import sqlite3
 
-from fastapi import APIRouter, Depends, HTTPException, Request, Response, status
+from fastapi import APIRouter, HTTPException, Request, Response, status
 from pydantic import BaseModel, Field
 from starlette.concurrency import run_in_threadpool
 
 from .ddns_models import DdnsSettings
-from .ddns_security import verify_session_cookie
 from .ddns_service import DdnsService, normalize_domain
 from .ddns_store import DdnsStore
 
@@ -73,12 +72,6 @@ class RouterUpdateResponse(BaseModel):
 def create_api_router(settings: DdnsSettings, store: DdnsStore, service: DdnsService) -> APIRouter:
     router = APIRouter(prefix="/api/v1")
 
-    def optional_user(request: Request) -> dict[str, str | int] | None:
-        user_id = verify_session_cookie(request.cookies.get("ddns_session"), settings.session_secret)
-        return store.get_user(user_id) if user_id is not None else None
-
-    optional_user_dependency = Depends(optional_user)
-
     @router.post(
         "/hostnames/magic",
         response_model=HostnameCredentials,
@@ -88,7 +81,7 @@ def create_api_router(settings: DdnsSettings, store: DdnsStore, service: DdnsSer
         responses={500: {"model": ErrorResponse}},
     )
     async def create_magic_hostname(payload: MagicHostnameRequest) -> HostnameCredentials:
-        account = await run_in_threadpool(service.create_managed_account, payload.username, None)
+        account = await run_in_threadpool(service.create_managed_account, payload.username)
         return _credentials_response(service, account)
 
     @router.get(
@@ -132,11 +125,10 @@ def create_api_router(settings: DdnsSettings, store: DdnsStore, service: DdnsSer
     )
     async def create_domain_challenge(
         payload: DomainChallengeRequest,
-        user: dict[str, str | int] | None = optional_user_dependency,
     ) -> DomainChallengeResponse:
         domain = normalize_domain(payload.domain)
         try:
-            challenge = await run_in_threadpool(service.create_domain_challenge, domain, int(user["id"]) if user else None)
+            challenge = await run_in_threadpool(service.create_domain_challenge, domain)
         except sqlite3.IntegrityError as exc:
             raise HTTPException(status_code=409, detail="domain is already verified") from exc
         return DomainChallengeResponse(
@@ -155,10 +147,9 @@ def create_api_router(settings: DdnsSettings, store: DdnsStore, service: DdnsSer
     )
     async def verify_domain(
         payload: VerifyDomainRequest,
-        user: dict[str, str | int] | None = optional_user_dependency,
     ) -> VerifyDomainResponse:
         domain = normalize_domain(payload.domain)
-        found, challenge = await run_in_threadpool(service.verify_domain, domain, payload.claim_secret, int(user["id"]) if user else None)
+        found, challenge = await run_in_threadpool(service.verify_domain, domain, payload.claim_secret)
         if not found:
             return VerifyDomainResponse(
                 domain=domain,
@@ -183,14 +174,12 @@ def create_api_router(settings: DdnsSettings, store: DdnsStore, service: DdnsSer
     )
     async def create_custom_hostname(
         payload: CustomHostnameRequest,
-        user: dict[str, str | int] | None = optional_user_dependency,
     ) -> HostnameCredentials:
         account = await run_in_threadpool(
             service.create_custom_account,
             payload.hostname,
             payload.claim_secret,
             payload.username,
-            int(user["id"]) if user else None,
         )
         return _credentials_response(service, account)
 
diff --git a/router_dyndns/ddns_models.py b/router_dyndns/ddns_models.py
index 21a50f3..45f30b4 100644
--- a/router_dyndns/ddns_models.py
+++ b/router_dyndns/ddns_models.py
@@ -15,9 +15,6 @@ class DdnsSettings(BaseModel):
     public_base_url: str = Field(default="http://localhost:8080")
     hostname_suffix: str = Field(default="")
     verification_prefix: str = Field(default="_router_dyndns-ddns")
-    session_secret: str = Field(default="")
-    require_invite: bool = Field(default=False)
-    max_hostnames_per_user: int = Field(default=5, ge=1, le=100)
     rate_limit_per_minute: int = Field(default=60, ge=1, le=10_000)
     trusted_proxy_ips: set[str] = Field(default_factory=set)
     rfc2136_server: str | None = None
@@ -56,9 +53,6 @@ class DdnsSettings(BaseModel):
             public_base_url=os.getenv("DDNS_PUBLIC_BASE_URL", "http://localhost:8080"),
             hostname_suffix=os.getenv("DDNS_HOSTNAME_SUFFIX", ""),
             verification_prefix=os.getenv("DDNS_VERIFICATION_PREFIX", "_router_dyndns-ddns"),
-            session_secret=os.getenv("DDNS_SESSION_SECRET", os.getenv("DDNS_ADMIN_PASSWORD", "")),
-            require_invite=os.getenv("DDNS_REQUIRE_INVITE", "0").strip().lower() not in {"0", "false", "no"},
-            max_hostnames_per_user=_env_int("DDNS_MAX_HOSTNAMES_PER_USER", 5),
             rate_limit_per_minute=_env_int("DDNS_RATE_LIMIT_PER_MINUTE", 60),
             trusted_proxy_ips=trusted_proxy_ips,
             rfc2136_server=os.getenv("DDNS_RFC2136_SERVER") or None,
diff --git a/router_dyndns/ddns_security.py b/router_dyndns/ddns_security.py
index 0ef509e..7c74da0 100644
--- a/router_dyndns/ddns_security.py
+++ b/router_dyndns/ddns_security.py
@@ -3,13 +3,11 @@ from __future__ import annotations
 import base64
 import hashlib
 import hmac
-import re
 import secrets
-import time
 from datetime import UTC, datetime
 from ipaddress import ip_address, ip_network
 
-from fastapi import HTTPException, Request, Response
+from fastapi import HTTPException, Request
 
 from .ddns_models import DdnsSettings
 
@@ -46,49 +44,8 @@ def hash_lookup_token(token: str) -> str:
     return hashlib.sha256(token.encode("utf-8")).hexdigest()
 
 
-def normalize_email(value: str) -> str:
-    email = value.strip().lower()
-    if not re.fullmatch(r"[^@\s]+@[^@\s]+\.[^@\s]+", email):
-        return ""
-    return email
-
-
-def make_session_cookie(user_id: int, secret: str) -> str:
-    timestamp = str(int(time.time()))
-    payload = f"{user_id}:{timestamp}"
-    signature = _session_signature(payload, secret)
-    return base64.urlsafe_b64encode(f"{payload}:{signature}".encode()).decode("ascii")
-
-
-def verify_session_cookie(value: str | None, secret: str, max_age_seconds: int = 60 * 60 * 24 * 30) -> int | None:
-    if not value or not secret:
-        return None
-    try:
-        decoded = base64.urlsafe_b64decode(value.encode("ascii")).decode("utf-8")
-        user_id, timestamp, signature = decoded.split(":", 2)
-    except Exception:
-        return None
-    payload = f"{user_id}:{timestamp}"
-    if not hmac.compare_digest(signature, _session_signature(payload, secret)):
-        return None
-    if int(time.time()) - int(timestamp) > max_age_seconds:
-        return None
-    return int(user_id)
-
-
-def set_session_cookie(response: Response, settings: DdnsSettings, user_id: int) -> None:
-    response.set_cookie(
-        "ddns_session",
-        make_session_cookie(user_id, settings.session_secret),
-        max_age=60 * 60 * 24 * 30,
-        httponly=True,
-        secure=settings.public_base_url.startswith("https://"),
-        samesite="strict",
-    )
-
-
 def admin_csrf_token(settings: DdnsSettings) -> str:
-    secret = settings.admin_password or settings.shared_secret or settings.session_secret
+    secret = settings.admin_password or settings.shared_secret
     day = datetime.now(UTC).strftime("%Y-%m-%d")
     return hmac.new(secret.encode("utf-8"), f"admin:{day}".encode(), hashlib.sha256).hexdigest()
 
@@ -109,8 +66,6 @@ def client_ip(request: Request, settings: DdnsSettings | None = None) -> str:
 def is_rate_limited_path(path: str) -> bool:
     limited_paths = {
         "/magic",
-        "/login",
-        "/register",
         "/accounts",
         "/request-domain",
         "/verify-domain",
@@ -121,10 +76,6 @@ def is_rate_limited_path(path: str) -> bool:
     )
 
 
-def _session_signature(payload: str, secret: str) -> str:
-    return hmac.new(secret.encode("utf-8"), payload.encode("utf-8"), hashlib.sha256).hexdigest()
-
-
 def _trusted_proxy(peer: str, trusted: set[str]) -> bool:
     if not trusted:
         return False
diff --git a/router_dyndns/ddns_service.py b/router_dyndns/ddns_service.py
index ed14197..05cd98d 100644
--- a/router_dyndns/ddns_service.py
+++ b/router_dyndns/ddns_service.py
@@ -29,18 +29,12 @@ class DdnsService:
         self._locks_guard = threading.Lock()
         self._locks: dict[str, threading.Lock] = {}
 
-    def create_managed_account(self, username: str | None = None, owner_user_id: int | None = None) -> dict[str, str]:
+    def create_managed_account(self, username: str | None = None) -> dict[str, str]:
         if not self.settings.hostname_suffix:
             raise HTTPException(status_code=500, detail="DDNS_HOSTNAME_SUFFIX is required")
-        if owner_user_id is not None:
-            self._enforce_account_quota(owner_user_id)
         for _ in range(5):
             try:
-                return self.store.create_account(
-                    self.random_managed_hostname(),
-                    username,
-                    owner_user_id=owner_user_id,
-                )
+                return self.store.create_account(self.random_managed_hostname(), username)
             except sqlite3.IntegrityError:
                 continue
         raise HTTPException(status_code=500, detail="could not allocate hostname")
@@ -50,36 +44,33 @@ class DdnsService:
         hostname: str,
         claim_secret: str,
         username: str | None = None,
-        owner_user_id: int | None = None,
     ) -> dict[str, str]:
         normalized = normalize_hostname(hostname, self.settings, expand_suffix=False)
         if not normalized:
             raise HTTPException(status_code=400, detail="valid custom hostname is required")
         if not self.hostname_is_publishable(normalized):
             raise HTTPException(status_code=403, detail="hostname is outside configured DNS publishing zones")
-        if not self.best_verified_parent(normalized, owner_user_id, claim_secret):
+        if not self.best_verified_parent(normalized, claim_secret):
             raise HTTPException(status_code=403, detail="verify the parent domain before creating this hostname")
-        if owner_user_id is not None:
-            self._enforce_account_quota(owner_user_id)
         try:
-            return self.store.create_account(normalized, username, owner_user_id=owner_user_id)
+            return self.store.create_account(normalized, username)
         except sqlite3.IntegrityError as exc:
             raise HTTPException(status_code=409, detail="hostname already exists") from exc
 
-    def create_domain_challenge(self, domain: str, owner_user_id: int | None = None) -> dict[str, str]:
+    def create_domain_challenge(self, domain: str) -> dict[str, str]:
         normalized = normalize_domain(domain)
         if not normalized:
             raise HTTPException(status_code=400, detail="valid domain is required")
-        existing = self.store.get_domain_challenge(normalized, owner_user_id=owner_user_id)
+        existing = self.store.get_domain_challenge(normalized)
         if existing and existing.get("verified_at"):
             raise HTTPException(status_code=409, detail="domain is already verified")
-        return self.store.create_domain_challenge(normalized, owner_user_id)
+        return self.store.create_domain_challenge(normalized)
 
-    def verify_domain(self, domain: str, claim_secret: str, owner_user_id: int | None = None) -> tuple[bool, dict[str, str | None]]:
+    def verify_domain(self, domain: str, claim_secret: str) -> tuple[bool, dict[str, str | None]]:
         normalized = normalize_domain(domain)
         if not normalized:
             raise HTTPException(status_code=400, detail="valid domain is required")
-        challenge = self.store.get_domain_challenge(normalized, owner_user_id=owner_user_id, claim_secret=claim_secret)
+        challenge = self.store.get_domain_challenge(normalized, claim_secret=claim_secret)
         if not challenge:
             raise HTTPException(status_code=404, detail="domain challenge not found")
         found = dns_txt_contains(self.verification_name(normalized), str(challenge["token"]))
@@ -87,7 +78,7 @@ class DdnsService:
             challenge = dict(challenge)
             challenge["claim_secret"] = claim_secret
             return False, challenge
-        verified = self.store.verify_domain_challenge(normalized, owner_user_id=owner_user_id)
+        verified = self.store.verify_domain_challenge(normalized)
         if verified is None:
             raise HTTPException(status_code=404, detail="domain challenge not found")
         verified = dict(verified)
@@ -147,18 +138,13 @@ class DdnsService:
             raise HTTPException(status_code=500, detail="DDNS_HOSTNAME_SUFFIX is required for managed hostnames")
         return f"{secrets.token_hex(6)}.{suffix}"
 
-    def best_verified_parent(
-        self,
-        hostname: str,
-        owner_user_id: int | None = None,
-        claim_secret: str | None = None,
-    ) -> str | None:
+    def best_verified_parent(self, hostname: str, claim_secret: str | None = None) -> str | None:
         labels = hostname.split(".")
         for index in range(1, len(labels) - 1):
             candidate = ".".join(labels[index:])
-            if self.store.is_domain_verified(candidate, owner_user_id, claim_secret):
+            if self.store.is_domain_verified(candidate, claim_secret):
                 return candidate
-        if self.store.is_domain_verified(hostname, owner_user_id, claim_secret):
+        if self.store.is_domain_verified(hostname, claim_secret):
             return hostname
         return None
 
@@ -180,10 +166,6 @@ class DdnsService:
             zones.add(self.settings.hostname_suffix.strip().lower().strip("."))
         return bool(zones) and any(hostname == zone or hostname.endswith(f".{zone}") for zone in zones)
 
-    def _enforce_account_quota(self, owner_user_id: int) -> None:
-        if self.store.count_user_accounts(owner_user_id) >= self.settings.max_hostnames_per_user:
-            raise HTTPException(status_code=403, detail="hostname quota exceeded")
-
     def _lock_for(self, hostname: str) -> threading.Lock:
         with self._locks_guard:
             lock = self._locks.get(hostname)
diff --git a/router_dyndns/ddns_store.py b/router_dyndns/ddns_store.py
index 72c9359..a2dc349 100644
--- a/router_dyndns/ddns_store.py
+++ b/router_dyndns/ddns_store.py
@@ -84,12 +84,7 @@ class DdnsStore:
             update_ipv6=update_ipv6,
         )
 
-    def create_account(
-        self,
-        hostname: str,
-        username: str | None = None,
-        owner_user_id: int | None = None,
-    ) -> dict[str, str]:
+    def create_account(self, hostname: str, username: str | None = None) -> dict[str, str]:
         now = datetime.now(UTC).isoformat()
         token = secrets.token_urlsafe(24)
         update_slug = secrets.token_urlsafe(32)
@@ -100,10 +95,10 @@ class DdnsStore:
         with self.connect() as conn:
             conn.execute(
                 """
-                INSERT INTO accounts(hostname, username, token_hash, update_slug, management_hash, owner_user_id, created_at, disabled)
-                VALUES (?, ?, ?, ?, ?, ?, ?, 0)
+                INSERT INTO accounts(hostname, username, token_hash, update_slug, management_hash, created_at, disabled)
+                VALUES (?, ?, ?, ?, ?, ?, 0)
                 """,
-                (hostname, username, token_hash, update_slug, management_hash, owner_user_id, now),
+                (hostname, username, token_hash, update_slug, management_hash, now),
             )
         return {
             "hostname": hostname,
@@ -113,21 +108,18 @@ class DdnsStore:
             "management_slug": management_slug,
         }
 
-    def list_accounts(self, owner_user_id: int | None = None) -> list[dict[str, str | int | None]]:
+    def list_accounts(self) -> list[dict[str, str | int | None]]:
         with self.connect() as conn:
             conn.row_factory = sqlite3.Row
-            sql = """
-            SELECT accounts.hostname, accounts.username, accounts.update_slug, accounts.owner_user_id,
+            rows = conn.execute(
+                """
+            SELECT accounts.hostname, accounts.username, accounts.update_slug,
                    accounts.created_at, accounts.disabled, records.ipv4, records.ipv6, records.updated_at
             FROM accounts
             LEFT JOIN records ON records.hostname = accounts.hostname
+            ORDER BY accounts.hostname
             """
-            params: tuple[int, ...] = ()
-            if owner_user_id is not None:
-                sql += " WHERE accounts.owner_user_id = ?"
-                params = (owner_user_id,)
-            sql += " ORDER BY accounts.hostname"
-            rows = conn.execute(sql, params).fetchall()
+            ).fetchall()
         return [dict(row) for row in rows]
 
     def get_account_by_slug(self, update_slug: str) -> dict[str, str | int | None] | None:
@@ -147,7 +139,7 @@ class DdnsStore:
             conn.row_factory = sqlite3.Row
             account = conn.execute(
                 """
-                SELECT accounts.hostname, accounts.username, accounts.update_slug, accounts.owner_user_id,
+                SELECT accounts.hostname, accounts.username, accounts.update_slug,
                        accounts.created_at, accounts.disabled, records.ipv4, records.ipv6, records.updated_at
                 FROM accounts
                 LEFT JOIN records ON records.hostname = accounts.hostname
@@ -178,66 +170,47 @@ class DdnsStore:
             conn.execute("DELETE FROM accounts WHERE hostname = ?", (hostname,))
             conn.execute("DELETE FROM records WHERE hostname = ?", (hostname,))
 
-    def create_domain_challenge(self, domain: str, owner_user_id: int | None = None) -> dict[str, str]:
+    def create_domain_challenge(self, domain: str) -> dict[str, str]:
         token = f"ff-ddns-{secrets.token_urlsafe(24)}"
         claim_secret = secrets.token_urlsafe(32)
         claim_hash = hash_lookup_token(claim_secret)
         now = datetime.now(UTC).isoformat()
         with self.connect() as conn:
-            existing = conn.execute("SELECT owner_user_id, verified_at FROM domain_challenges WHERE domain = ?", (domain,)).fetchone()
-            if existing and existing[1]:
+            existing = conn.execute("SELECT verified_at FROM domain_challenges WHERE domain = ?", (domain,)).fetchone()
+            if existing and existing[0]:
                 raise sqlite3.IntegrityError("domain is already verified")
-            if existing and owner_user_id is not None and existing[0] is not None and int(existing[0]) != owner_user_id:
-                raise sqlite3.IntegrityError("domain challenge belongs to another user")
             conn.execute(
                 """
-                INSERT INTO domain_challenges(domain, token, claim_hash, owner_user_id, created_at, verified_at)
-                VALUES (?, ?, ?, ?, ?, NULL)
+                INSERT INTO domain_challenges(domain, token, claim_hash, created_at, verified_at)
+                VALUES (?, ?, ?, ?, NULL)
                 ON CONFLICT(domain) DO UPDATE SET
                   token=excluded.token,
                   claim_hash=excluded.claim_hash,
-                  owner_user_id=excluded.owner_user_id,
                   created_at=excluded.created_at,
                   verified_at=NULL
                 """,
-                (domain, token, claim_hash, owner_user_id, now),
+                (domain, token, claim_hash, now),
             )
         return {"domain": domain, "token": token, "claim_secret": claim_secret}
 
-    def verify_domain_challenge(self, domain: str, owner_user_id: int | None = None) -> dict[str, str | None] | None:
+    def verify_domain_challenge(self, domain: str) -> dict[str, str | None] | None:
         now = datetime.now(UTC).isoformat()
         with self.connect() as conn:
             conn.row_factory = sqlite3.Row
-            sql = "SELECT domain, token, verified_at FROM domain_challenges WHERE domain = ?"
-            params: tuple[str, ...] | tuple[str, int] = (domain,)
-            if owner_user_id is not None:
-                sql += " AND owner_user_id = ?"
-                params = (domain, owner_user_id)
-            challenge = conn.execute(sql, params).fetchone()
+            challenge = conn.execute("SELECT domain, token, verified_at FROM domain_challenges WHERE domain = ?", (domain,)).fetchone()
             if not challenge:
                 return None
-            if owner_user_id is not None:
-                conn.execute("UPDATE domain_challenges SET verified_at = ? WHERE domain = ? AND owner_user_id = ?", (now, domain, owner_user_id))
-            else:
-                conn.execute("UPDATE domain_challenges SET verified_at = ? WHERE domain = ?", (now, domain))
+            conn.execute("UPDATE domain_challenges SET verified_at = ? WHERE domain = ?", (now, domain))
         result = dict(challenge)
         result["verified_at"] = now
         return result
 
-    def get_domain_challenge(
-        self,
-        domain: str,
-        owner_user_id: int | None = None,
-        claim_secret: str | None = None,
-    ) -> dict[str, str | None] | None:
+    def get_domain_challenge(self, domain: str, claim_secret: str | None = None) -> dict[str, str | None] | None:
         with self.connect() as conn:
             conn.row_factory = sqlite3.Row
             sql = "SELECT domain, token, verified_at FROM domain_challenges WHERE domain = ?"
-            params: tuple[str, ...] | tuple[str, int] = (domain,)
-            if owner_user_id is not None:
-                sql += " AND owner_user_id = ?"
-                params = (domain, owner_user_id)
-            elif claim_secret is not None:
+            params = (domain,)
+            if claim_secret is not None:
                 sql += " AND claim_hash = ?"
                 params = (domain, hash_lookup_token(claim_secret))
             challenge = conn.execute(sql, params).fetchone()
@@ -256,86 +229,16 @@ class DdnsStore:
         result["claim_secret"] = claim_secret
         return result
 
-    def is_domain_verified(
-        self,
-        domain: str,
-        owner_user_id: int | None = None,
-        claim_secret: str | None = None,
-    ) -> bool:
+    def is_domain_verified(self, domain: str, claim_secret: str | None = None) -> bool:
         with self.connect() as conn:
             sql = "SELECT verified_at FROM domain_challenges WHERE domain = ?"
-            params: tuple[str, ...] | tuple[str, int] = (domain,)
-            if owner_user_id is not None:
-                sql += " AND owner_user_id = ?"
-                params = (domain, owner_user_id)
-            elif claim_secret is not None:
+            params = (domain,)
+            if claim_secret is not None:
                 sql += " AND claim_hash = ?"
                 params = (domain, hash_lookup_token(claim_secret))
             verified_at = conn.execute(sql, params).fetchone()
         return bool(verified_at and verified_at[0])
 
-    def count_user_accounts(self, owner_user_id: int) -> int:
-        with self.connect() as conn:
-            row = conn.execute("SELECT COUNT(*) FROM accounts WHERE owner_user_id = ? AND disabled = 0", (owner_user_id,)).fetchone()
-        return int(row[0])
-
-    def create_user(self, email: str, password: str, invite_code: str | None, require_invite: bool) -> dict[str, str | int]:
-        now = datetime.now(UTC).isoformat()
-        password_hash = hash_secret(password)
-        with self.connect() as conn:
-            if require_invite:
-                invite = conn.execute(
-                    "SELECT code, used_at FROM invites WHERE code = ?",
-                    (invite_code or "",),
-                ).fetchone()
-                if not invite or invite[1]:
-                    raise ValueError("invalid invite code")
-            cursor = conn.execute(
-                """
-                INSERT INTO users(email, password_hash, created_at, disabled)
-                VALUES (?, ?, ?, 0)
-                """,
-                (email, password_hash, now),
-            )
-            user_id = int(cursor.lastrowid)
-            if require_invite and invite_code:
-                conn.execute("UPDATE invites SET used_at = ?, used_by_user_id = ? WHERE code = ?", (now, user_id, invite_code))
-        return {"id": user_id, "email": email}
-
-    def authenticate_user(self, email: str, password: str) -> dict[str, str | int] | None:
-        with self.connect() as conn:
-            conn.row_factory = sqlite3.Row
-            user = conn.execute(
-                "SELECT id, email, password_hash, disabled FROM users WHERE email = ?",
-                (email,),
-            ).fetchone()
-        if not user or user["disabled"] or not verify_secret(password, user["password_hash"]):
-            return None
-        return {"id": int(user["id"]), "email": str(user["email"])}
-
-    def get_user(self, user_id: int) -> dict[str, str | int] | None:
-        with self.connect() as conn:
-            conn.row_factory = sqlite3.Row
-            user = conn.execute("SELECT id, email, disabled FROM users WHERE id = ?", (user_id,)).fetchone()
-        if not user or user["disabled"]:
-            return None
-        return {"id": int(user["id"]), "email": str(user["email"])}
-
-    def create_invite(self) -> dict[str, str]:
-        code = secrets.token_urlsafe(18)
-        now = datetime.now(UTC).isoformat()
-        with self.connect() as conn:
-            conn.execute("INSERT INTO invites(code, created_at) VALUES (?, ?)", (code, now))
-        return {"code": code}
-
-    def list_invites(self) -> list[dict[str, str | None]]:
-        with self.connect() as conn:
-            conn.row_factory = sqlite3.Row
-            rows = conn.execute(
-                "SELECT code, created_at, used_at FROM invites ORDER BY created_at DESC LIMIT 50"
-            ).fetchall()
-        return [dict(row) for row in rows]
-
     def list_records(self) -> list[dict[str, str | None]]:
         with self.connect() as conn:
             conn.row_factory = sqlite3.Row
@@ -451,16 +354,13 @@ class DdnsStore:
                   token_hash TEXT NOT NULL,
                   update_slug TEXT NOT NULL UNIQUE,
                   management_hash TEXT UNIQUE,
-                  owner_user_id INTEGER,
                   created_at TEXT NOT NULL,
-                  disabled INTEGER NOT NULL DEFAULT 0,
-                  FOREIGN KEY(owner_user_id) REFERENCES users(id) ON DELETE SET NULL
+                  disabled INTEGER NOT NULL DEFAULT 0
                 )
                 """
             )
             _ensure_column(conn, "accounts", "update_slug", "TEXT")
             _ensure_column(conn, "accounts", "management_hash", "TEXT")
-            _ensure_column(conn, "accounts", "owner_user_id", "INTEGER")
             for row in conn.execute("SELECT hostname FROM accounts WHERE update_slug IS NULL OR update_slug = ''"):
                 conn.execute("UPDATE accounts SET update_slug = ? WHERE hostname = ?", (secrets.token_urlsafe(32), row[0]))
             for row in conn.execute("SELECT hostname FROM accounts WHERE management_hash IS NULL OR management_hash = ''"):
@@ -473,37 +373,12 @@ class DdnsStore:
                   domain TEXT PRIMARY KEY,
                   token TEXT NOT NULL,
                   claim_hash TEXT,
-                  owner_user_id INTEGER,
                   created_at TEXT NOT NULL,
-                  verified_at TEXT,
-                  FOREIGN KEY(owner_user_id) REFERENCES users(id) ON DELETE CASCADE
+                  verified_at TEXT
                 )
                 """
             )
             _ensure_column(conn, "domain_challenges", "claim_hash", "TEXT")
-            _ensure_column(conn, "domain_challenges", "owner_user_id", "INTEGER")
-            conn.execute(
-                """
-                CREATE TABLE IF NOT EXISTS users (
-                  id INTEGER PRIMARY KEY AUTOINCREMENT,
-                  email TEXT NOT NULL UNIQUE,
-                  password_hash TEXT NOT NULL,
-                  created_at TEXT NOT NULL,
-                  disabled INTEGER NOT NULL DEFAULT 0
-                )
-                """
-            )
-            conn.execute(
-                """
-                CREATE TABLE IF NOT EXISTS invites (
-                  code TEXT PRIMARY KEY,
-                  created_at TEXT NOT NULL,
-                  used_at TEXT,
-                  used_by_user_id INTEGER,
-                  FOREIGN KEY(used_by_user_id) REFERENCES users(id) ON DELETE SET NULL
-                )
-                """
-            )
 
 
 def _default_username(hostname: str) -> str:
diff --git a/tests/test_ddns.py b/tests/test_ddns.py
index 2a3d066..ded4f2d 100644
--- a/tests/test_ddns.py
+++ b/tests/test_ddns.py
@@ -7,15 +7,6 @@ import router_dyndns.ddns_service as ddns_service
 from router_dyndns.ddns import DdnsSettings, DdnsStore, make_app
 
 
-def login_test_user(client: TestClient) -> None:
-    response = client.post(
-        "/register",
-        data={"email": "alice@example.net", "password": "very-secure-password"},
-        follow_redirects=False,
-    )
-    assert response.status_code == 303
-
-
 def test_update_accepts_fritzbox_placeholders(tmp_path: Path) -> None:
     app = make_app(
         DdnsSettings(
@@ -194,39 +185,6 @@ def test_admin_password_query_string_is_rejected(tmp_path: Path) -> None:
     assert response.status_code == 401
 
 
-def test_registration_is_open_by_default_for_optional_accounts(tmp_path: Path) -> None:
-    app = make_app(DdnsSettings(database_path=tmp_path / "ddns.sqlite3", admin_password="admin"))
-    client = TestClient(app)
-
-    response = client.post(
-        "/register",
-        data={"email": "alice@example.net", "password": "very-secure-password"},
-        follow_redirects=False,
-    )
-
-    assert response.status_code == 303
-
-
-def test_admin_invite_allows_registration(tmp_path: Path) -> None:
-    database_path = tmp_path / "ddns.sqlite3"
-    store = DdnsStore(database_path)
-    invite = store.create_invite()
-    app = make_app(DdnsSettings(database_path=database_path, admin_password="admin"))
-    client = TestClient(app)
-
-    response = client.post(
-        "/register",
-        data={
-            "email": "alice@example.net",
-            "password": "very-secure-password",
-            "invite": invite["code"],
-        },
-        follow_redirects=False,
-    )
-
-    assert response.status_code == 303
-
-
 def test_self_service_managed_hostname_generates_random_account(tmp_path: Path) -> None:
     app = make_app(
         DdnsSettings(
@@ -234,11 +192,9 @@ def test_self_service_managed_hostname_generates_random_account(tmp_path: Path)
             admin_password="admin",
             hostname_suffix="ddns.example.net",
             public_base_url="http://ddns.example.net",
-            require_invite=False,
         )
     )
     client = TestClient(app)
-    login_test_user(client)
 
     response = client.post("/accounts", data={"mode": "managed", "username": "alice"})
 
@@ -287,9 +243,8 @@ def test_magic_management_link_can_delete_hostname(tmp_path: Path) -> None:
 
 
 def test_custom_hostname_requires_verified_parent_domain(tmp_path: Path) -> None:
-    app = make_app(DdnsSettings(database_path=tmp_path / "ddns.sqlite3", admin_password="admin", require_invite=False))
+    app = make_app(DdnsSettings(database_path=tmp_path / "ddns.sqlite3", admin_password="admin"))
     client = TestClient(app)
-    login_test_user(client)
 
     response = client.post("/accounts", data={"mode": "custom", "hostname": "home.example.net"})
 
@@ -303,14 +258,12 @@ def test_custom_hostname_after_dns_verification(tmp_path: Path, monkeypatch) ->
             database_path=tmp_path / "ddns.sqlite3",
             admin_password="admin",
             public_base_url="http://ddns.example.net",
-            require_invite=False,
         )
     )
     client = TestClient(app)
-    login_test_user(client)
 
     store = DdnsStore(tmp_path / "ddns.sqlite3")
-    challenge_data = store.create_domain_challenge("example.net", owner_user_id=1)
+    challenge_data = store.create_domain_challenge("example.net")
     verify = client.post(
         "/verify-domain",
         data={"domain": "example.net", "claim_secret": challenge_data["claim_secret"]},
@@ -441,7 +394,6 @@ def test_api_custom_hostname_requires_verified_domain(tmp_path: Path, monkeypatc
     monkeypatch.setattr(ddns_service, "dns_txt_contains", lambda name, expected: True)
     app = make_app(DdnsSettings(database_path=tmp_path / "ddns.sqlite3", admin_password="admin"))
     client = TestClient(app)
-    login_test_user(client)
 
     challenge = client.post("/api/v1/domains/challenges", json={"domain": "example.net"})
     assert challenge.status_code == 201
@@ -527,7 +479,6 @@ def test_verified_domain_challenge_cannot_be_overwritten(tmp_path: Path, monkeyp
     monkeypatch.setattr(ddns_service, "dns_txt_contains", lambda name, expected: True)
     app = make_app(DdnsSettings(database_path=tmp_path / "ddns.sqlite3", admin_password="admin"))
     client = TestClient(app)
-    login_test_user(client)
 
     challenge = client.post("/api/v1/domains/challenges", json={"domain": "example.net"}).json()
     verified = client.post(
@@ -540,25 +491,6 @@ def test_verified_domain_challenge_cannot_be_overwritten(tmp_path: Path, monkeyp
     assert overwrite.status_code == 409
 
 
-def test_logged_in_hostname_quota_is_enforced(tmp_path: Path) -> None:
-    app = make_app(
-        DdnsSettings(
-            database_path=tmp_path / "ddns.sqlite3",
-            admin_password="admin",
-            hostname_suffix="ddns.example.net",
-            max_hostnames_per_user=1,
-        )
-    )
-    client = TestClient(app)
-    login_test_user(client)
-
-    first = client.post("/accounts", data={"mode": "managed", "username": "one"})
-    second = client.post("/accounts", data={"mode": "managed", "username": "two"})
-
-    assert first.status_code == 200
-    assert second.status_code == 403
-
-
 def test_custom_hostname_must_be_inside_publishable_dns_zone(tmp_path: Path, monkeypatch) -> None:
     monkeypatch.setattr(ddns_service, "dns_txt_contains", lambda name, expected: True)
     app = make_app(
@@ -572,7 +504,6 @@ def test_custom_hostname_must_be_inside_publishable_dns_zone(tmp_path: Path, mon
         )
     )
     client = TestClient(app)
-    login_test_user(client)
 
     challenge = client.post("/api/v1/domains/challenges", json={"domain": "example.net"}).json()
     client.post(