'Update the PublicKeyInstance
:param unicode friendly_name: A human readable description of this resource
:returns: Updated PublicKeyInstance
:rtype: twilio.rest.accounts.v1.credential.public_key.PublicKeyInstance'

def update(self, friendly_name=values.unset):

    data = values.of({'FriendlyName': friendly_name})
    payload = self._version.update('POST', self._uri, data=data)
    return PublicKeyInstance(self._version, payload, sid=self._solution['sid'])
