code: def _credentials_file(self) -> Any:
      path = self._credentials_provider._creds_filename
      path = os.path.expandvars(path)
      path = os.path.expanduser(path)
      return path
  
imports: import logging
  import os
  import threading
  import time
  from typing import Any
  import boto3
  from botocore import session
  from botocore.compat import ensure_unicode
  from botocore.credentials import CredentialProvider, Credentials, ReadOnlyCredentials, SharedCredentialProvider
  from botocore.session import get_session
label_desc: Use image node_id 3 for calling the RefreshableSharedCredentials obj's underlying member method code with example usage: obj._credentials_file() and returns: path