Send custom data along with handshakeData in socket.io?

Question

So I have an application running node js with socket.io as a backend and normal javascript as frontend. My application has a login system which currently simply has the clie

Answer 1

I found a little problem to see the .loggeduser

io.sockets.on('connection', function (socket) {
    var endp = socket.manager.handshaken[socket.id].address;
    console.log("query... " + socket.manager.handshaken[socket.id].query.loggeduser);
                                                                         // ↑ here
}