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 PublicKeyInstance(self._version, payload, sid=self._solution['<STR_LIT>'], )<EOL>
Update the PublicKeyInstance

:param unicode friendly_name: A string to describe the resource

:returns: Updated PublicKeyInstance
:rtype: twilio.rest.accounts.v1.credential.public_key.PublicKeyInstance