code: def credentials(self) -> Optional[Dict[str, Any]]:
      return self._creds
  
file_path: ludwig/ludwig/backend/utils/storage.py
imports: import contextlib
  from typing import Any, Dict, Optional, Union
  from ludwig.utils import data_utils
label_desc: Use image node_id 3 for calling the Storage obj's underlying member method code with example usage: obj.credentials() and returns: self