def fetch(self):
return self._proxy.fetch()<EOL>
Fetch a AuthCallsCredentialListMappingInstance

:returns: Fetched AuthCallsCredentialListMappingInstance
:rtype: twilio.rest.api.v2010.account.sip.domain.auth_types.auth_calls_mapping.auth_calls_credential_list_mapping.AuthCallsCredentialListMappingInstance