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

:returns: Fetched AuthRegistrationsCredentialListMappingInstance
:rtype: twilio.rest.api.v2010.account.sip.domain.auth_types.auth_registrations_mapping.auth_registrations_credential_list_mapping.AuthRegistrationsCredentialListMappingInstance