':param str ex_user_data: A valid uuid that references your exisiting
cloudscale.ch server.
:type       ex_user_data:  ``str``
:return: The server node you asked for.
:rtype: :class:`Node`'

def ex_node_by_uuid(self, uuid):

    res = self.connection.request(self._get_server_url(uuid))
    return self._to_node(res.object)
