code: def get_credential_store(
      self, registry: Optional[str]
  ) -> Optional[str]:
      if not registry or registry == INDEX_NAME:
          registry = INDEX_URL
  
      return self.cred_helpers.get(registry) or self.creds_store
  
imports: import base64
  import json
  import logging
  import os
  import platform
  from typing import Any, Dict, Mapping, Optional, Tuple, Union
  import dockerpycreds
label_desc: Use image node_id 11 for calling the AuthConfig obj's underlying member method code with example usage: obj.get_credential_store(registry) and returns: unknown