Fix 146: Autenticated client was overriding the manager and it was causing issue

Author: olethanh

src/aleph/sdk/client/authenticated_http.py

@@ -89,9 +89,6 @@ def __init__(
         )
         self.account = account
 
-    async def __aenter__(self) -> "AuthenticatedAlephHttpClient":
-        return self
-
     async def ipfs_push(self, content: Mapping) -> str:
         """
         Push arbitrary content as JSON to the IPFS service.

src/aleph/sdk/client/http.py

@@ -95,7 +95,9 @@ async def __aenter__(self) -> "AlephHttpClient":
         return self
 
     async def __aexit__(self, exc_type, exc_val, exc_tb):
-        await self.http_session.close()
+        # Avoid cascade in error handling
+        if self._http_session is not None:
+            await self._http_session.close()
 
     async def fetch_aggregate(self, address: str, key: str) -> Dict[str, Dict]:
         params: Dict[str, Any] = {"keys": key}