def credential_list_mappings(self):
        """
        Access the credential_list_mappings

        :returns: twilio.rest.api.v2010.account.sip.domain.credential_list_mapping.CredentialListMappingList
        :rtype: twilio.rest.api.v2010.account.sip.domain.credential_list_mapping.CredentialListMappingList
        """
        if self._credential_list_mappings is None:
            self._credential_list_mappings = CredentialListMappingList(
                self._version,
                account_sid=self._solution['account_sid'],
                domain_sid=self._solution['sid'],
            )
        return self._credential_list_mappings
Access the credential_list_mappings

        :returns: twilio.rest.api.v2010.account.sip.domain.credential_list_mapping.CredentialListMappingList
        :rtype: twilio.rest.api.v2010.account.sip.domain.credential_list_mapping.CredentialListMappingList