def update(self, friendly_name=values.unset, device_sid=values.unset):
        """
        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
        """
        return self._proxy.update(friendly_name=friendly_name, device_sid=device_sid, )
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