Fixes #11065: tenant_id not found when login via ADMIN_KEY (#11066)

api/app_factory.py

 
 from flask import Flask, Response, request
 from flask_cors import CORS
+from flask_login import user_loaded_from_request, user_logged_in
 from werkzeug.exceptions import Unauthorized
 
 import contexts
     user_id = decoded.get("user_id")
 
     logged_in_account = AccountService.load_logged_in_account(account_id=user_id)
-    if logged_in_account:
-        contexts.tenant_id.set(logged_in_account.current_tenant_id)
     return logged_in_account
 
 
+@user_logged_in.connect
+@user_loaded_from_request.connect
+def on_user_logged_in(_sender, user):
+    """Called when a user logged in."""
+    if user:
+        contexts.tenant_id.set(user.current_tenant_id)
+
+
 @login_manager.unauthorized_handler
 def unauthorized_handler():
     """Handle unauthorized requests."""