Reorganize base modules

fastapi_users/authentication/base.py

@@ -0,0 +1,18 @@
+from typing import Callable
+
+from starlette.responses import Response
+
+from fastapi_users.db import BaseUserDatabase
+from fastapi_users.models import BaseUserDB
+
+
+class BaseAuthentication:
+    """Base adapter for generating and decoding authentication tokens."""
+
+    async def get_login_response(self, user: BaseUserDB, response: Response):
+        raise NotImplementedError()
+
+    def get_authentication_method(
+        self, user_db: BaseUserDatabase
+    ) -> Callable[..., BaseUserDB]:
+        raise NotImplementedError()