Fix code scanning alert no. 65: Information exposure through an exception

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: arpitjain099

End_to_end_Solutions/AOAISearchDemo/app/data/app.py

@@ -238,7 +238,8 @@ def create_user_group(group_id: str):
     except (TypeError, NullValueError, MissingPropertyError) as e:
         return Response(response=str(e), status=400)
     except CosmosConflictError as e:
-        return Response(response=str(e), status=409)
+        logging.error("A conflict error occurred while creating user group: %s", e, exc_info=True)
+        return Response(response="A conflict error has occurred.", status=409)
     except Exception as e:
         logging.error("An error occurred while creating user group: %s", e, exc_info=True)
         return Response(response="An internal error has occurred.", status=500)