code: def _get_api_token(self) -> str:
      token_resp = self._auth_service.auth_service_login(
          body=V1LoginRequest(
              username=self._auth.username,
              api_key=self._auth.api_key,
          )
      )
      return token_resp.token
  
imports: from typing import Dict
  from lightning_cloud.openapi import ApiClient, AuthServiceApi, V1LoginRequest
  from lightning.app.utilities.login import Auth
label_desc: Use image node_id 2 for calling the _AuthTokenGetter obj's underlying member method code with example usage: obj._get_api_token() and returns: token_resp