Drop Python 3.9 support

fastapi_users/authentication/strategy/db/adapter.py

@@ -1,5 +1,5 @@
 from datetime import datetime
-from typing import Any, Generic, Optional, Protocol
+from typing import Any, Generic, Protocol
 
 from fastapi_users.authentication.strategy.db.models import AP
 
@@ -8,8 +8,8 @@ class AccessTokenDatabase(Protocol, Generic[AP]):
     """Protocol for retrieving, creating and updating access tokens from a database."""
 
     async def get_by_token(
-        self, token: str, max_age: Optional[datetime] = None
-    ) -> Optional[AP]:
+        self, token: str, max_age: datetime | None = None
+    ) -> AP | None:
         """Get a single access token by token."""
         ...  # pragma: no cover