aerc sendmail wip

src/services/microsoft_graph/auth.py

@@ -81,8 +81,13 @@ def get_access_token(scopes):
 
         token_response = app.acquire_token_by_device_flow(flow)
 
+    if token_response is None:
+        raise Exception("Token response is None - authentication failed")
+
     if "access_token" not in token_response:
-        raise Exception("Failed to acquire token")
+        error_description = token_response.get("error_description", "Unknown error")
+        error_code = token_response.get("error", "unknown_error")
+        raise Exception(f"Failed to acquire token - {error_code}: {error_description}")
 
     # Save token cache
     with open(cache_file, "w") as f: