Socketio-jwt with node.js

I have such code on server(NodeJs)... I'm using socketio-jwt npm module.How could I add rooms or other namespaces to the socket?! I tried 'io.sockets.of' but it seems not to be not correct?!

io.sockets
    .on('connection', socketioJwt.authorize({
        secret: config.secret,
        callback: false
    }))
//Success login
.on('authenticated', socket => {
    console.log('connect')
    //some work

    socket
        .on('add-message', chatMessageHandler)
        .on('disconnect', disconnectHandler)

        function chatMessageHandler(message) {
        io.emit('message', {...}});

        }
        //Disconnect
        function disconnectHandler() {
        console.log('disconnect')
        //
        }
})

via pavlos