code: def update(self, friendly_name=values.unset, device_sid=values.unset):
          
          return self._proxy.update(friendly_name=friendly_name, device_sid=device_sid, )
docs: Update the KeyInstance
  
          :param unicode friendly_name: The human readable description for this Key.
          :param unicode device_sid: The unique identifier of a Key to be authenticated.
  
          :returns: Updated KeyInstance
          :rtype: twilio.rest.preview.deployed_devices.fleet.key.KeyInstance