Update identity_client.py

Author: loveyana

veadk/integrations/ve_identity/identity_client.py

@@ -89,7 +89,8 @@ def _refresh_creds(self: IdentityClient):
         # Step 3: Try VeFaaS IAM if no credentials or no session_token
         # VeFaaS IAM provides complete credentials (ak, sk, session_token)
         if not (ak and sk) or (ak and sk and not session_token):
-            ak, sk, session_token = _try_get_vefaas_credentials()
+            if credentials := _try_get_vefaas_credentials():
+                ak, sk, session_token = credentials
 
         # Step 4: If still no session_token, try AssumeRole
         if ak and sk and not session_token: