'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'

@property
def credential_list_mappings(self):

    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
