code: def update(self, auth_payload=values.unset):
          
          data = values.of({'AuthPayload': auth_payload, })
  
          payload = self._version.update(
              'POST',
              self._uri,
              data=data,
          )
  
          return ChallengeInstance(
              self._version,
              payload,
              service_sid=self._solution['service_sid'],
              identity=self._solution['identity'],
              factor_sid=self._solution['factor_sid'],
              sid=self._solution['sid'],
          )
docs: Update the ChallengeInstance
  
          :param unicode auth_payload: Optional payload to verify the Challenge
  
          :returns: Updated ChallengeInstance
          :rtype: twilio.rest.authy.v1.service.entity.factor.challenge.ChallengeInstance