code: def __call__(self, *_: Any) -> "MockTokenStoreInstance":
      # For when somebody calls authentication.TokenStore().
      return self._mock
  
imports: import contextlib
  import os
  from typing import Any, Iterator, List, Optional, cast
  import responses
  from responses import registries
  import determined
  from determined.common.api import authentication
label_desc: Use image node_id 2 for calling the MockTokenStore obj's underlying member method code with example usage: obj.__call__() and returns: self