<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_instance(self, payload):
 """ Build an instance of FactorInstance :param dict payload: Payload response from the API :returns: twilio.rest.authy.v1.service.entity.factor.FactorInstance :rtype: twilio.rest.authy.v1.service.entity.factor.FactorInstance """

        return FactorInstance(
            self._version,
            payload,
            service_sid=self._solution['service_sid'],
            identity=self._solution['identity'],
        )