code: def get_instance(self, payload):
          
          return AuthCallsCredentialListMappingInstance(
              self._version,
              payload,
              account_sid=self._solution['account_sid'],
              domain_sid=self._solution['domain_sid'],
          )
docs: Build an instance of AuthCallsCredentialListMappingInstance
  
          :param dict payload: Payload response from the API
  
          :returns: twilio.rest.api.v2010.account.sip.domain.auth_types.auth_calls_mapping.auth_calls_credential_list_mapping.AuthCallsCredentialListMappingInstance
          :rtype: twilio.rest.api.v2010.account.sip.domain.auth_types.auth_calls_mapping.auth_calls_credential_list_mapping.AuthCallsCredentialListMappingInstance