Why Client says CONNECTED whereas the SERVER does not say so in NODE JS?

Details Regarding SERVER and CLIENT.
socket.io on server side (NODEJS)
socket.io-client on client side (also in NODEJS)

Nothing is logged on the SERVER side, as the server never lets the client connect to itself.
Whereas on the CLIENT side I see this output: 'I HAVE CONNECTED.'
SERVER CODE:

    var io = require('socket.io')(server); 

    io.use(function(socket, next){

        if (socket.handshake.query.user === "admin") {
            console.log("CALLED BEFORE CONNECTION........ :)");
            return next();
        }
        return next(new Error('Authentication error'));
    });

    io.on('connection', function(socket) {  
        console.log('CLIENT HAS CONNECTED.');
    });  

CLIENT CODE:

    var io = require('socket.io-client');

    var socket = io.connect('http://localhost:5000', { query: "user=admin11" });

    socket.on('connect', function (socket) {
        console.log('I HAVE CONNECTED.');
    });

via CoderX