code: def create(self, to, channel, custom_message=values.unset):
          
          data = values.of({'To': to, 'Channel': channel, 'CustomMessage': custom_message, })
  
          payload = self._version.create(
              'POST',
              self._uri,
              data=data,
          )
  
          return VerificationInstance(self._version, payload, service_sid=self._solution['service_sid'], )
docs: Create a new VerificationInstance
  
          :param unicode to: To phonenumber
          :param unicode channel: sms or call
          :param unicode custom_message: A custom message for this verification
  
          :returns: Newly created VerificationInstance
          :rtype: twilio.rest.preview.acc_security.service.verification.VerificationInstance