[Authlib] Fix AsyncOAuth2Client missing async context manager methods.

stubs/Authlib/@tests/test_cases/check_integration_httpx_client_oauth2.py

@@ -0,0 +1,11 @@
+from __future__ import annotations
+
+from authlib.integrations.httpx_client import AsyncOAuth2Client
+
+
+# ================================================================================
+# Test for AsyncOAuth2Client contex manager being correctly inherited and present.
+# ================================================================================
+async def test_client_contex_manager() -> None:
+    async with AsyncOAuth2Client():
+        pass

stubs/Authlib/authlib/integrations/httpx_client/oauth2_client.pyi

@@ -1,6 +1,7 @@
 from collections.abc import Generator
+from contextlib import _AsyncGeneratorContextManager
 from typing import ClassVar
-from typing_extensions import Never
+from typing_extensions import Never, Self
 
 import httpx2
 from authlib.oauth2.auth import ClientAuth, TokenAuth
@@ -42,8 +43,11 @@ class AsyncOAuth2Client(_OAuth2Client, httpx2.AsyncClient):
         leeway=60,
         **kwargs,
     ) -> None: ...
+    async def __aenter__(self) -> Self: ...
     async def request(self, method, url, withhold_token: bool = False, auth=..., **kwargs): ...
-    async def stream(self, method, url, withhold_token: bool = False, auth=..., **kwargs) -> Generator[Response]: ...  # type: ignore[override]
+    def stream(
+        self, method, url, withhold_token: bool = False, auth=..., **kwargs
+    ) -> _AsyncGeneratorContextManager[Response]: ...
     async def ensure_active_token(self, token): ...  # type: ignore[override]
 
 class OAuth2Client(_OAuth2Client, httpx2.Client):