def get_instance(self, payload):
return ChallengeInstance(<EOL>self._version,<EOL>payload,<EOL>service_sid=self._solution['<STR_LIT>'],<EOL>identity=self._solution['<STR_LIT>'],<EOL>factor_sid=self._solution['<STR_LIT>'],<EOL>)<EOL>
Build an instance of ChallengeInstance

:param dict payload: Payload response from the API

:returns: twilio.rest.authy.v1.service.entity.factor.challenge.ChallengeInstance
:rtype: twilio.rest.authy.v1.service.entity.factor.challenge.ChallengeInstance