def update(self, friendly_name=values.unset):
data = values.of({'<STR_LIT>': friendly_name, })<EOL>payload = self._version.update(<EOL>'<STR_LIT:POST>',<EOL>self._uri,<EOL>data=data,<EOL>)<EOL>return ServiceInstance(self._version, payload, sid=self._solution['<STR_LIT>'], )<EOL>
Update the ServiceInstance

:param unicode friendly_name: A human readable description of this resource.

:returns: Updated ServiceInstance
:rtype: twilio.rest.authy.v1.service.ServiceInstance