code: def verifications(self):
          
          if self._verifications is None:
              self._verifications = VerificationList(self._version, service_sid=self._solution['sid'], )
          return self._verifications
docs: Access the verifications
  
          :returns: twilio.rest.preview.acc_security.service.verification.VerificationList
          :rtype: twilio.rest.preview.acc_security.service.verification.VerificationList