Get return value when using call() with node.js

I am currently programming a socket server in node.js using the json-socket module, and am having some trouble.

Currently when a client connects to the server they send a command in a json object with some data for instance a login would look like this

{ type : 'login', data : { username: 'Spero78' } }

to deal with these requests i have a commands object

var commands = {
    'login' : authUser,
    'register' : userRegister
}

and these functions are called by server.on

server.on('connection', function(socket) {
    console.log('Client Connected');
    socket = new JsonSocket(socket);
    socket.on('message', function(message) {
        if(message.type != undefined) {
            if(commands[message.type]){
                var response = commands[message.type].call(this, message.data);
                if(response != undefined){
                    console.log(response);
                    socket.sendMessage(response);
                } else {
                    console.log("No Response!");
                }
            } else {
                console.log('Unexpected Command!');
            }
        }
    });
});

The functions return javascript objects but the response var is always undefined and the "No Response!" message is always printed

Here is the authUser function

function authUser(data){
    console.log('Auth: ' + data.username);
    database.query('SELECT * FROM players WHERE username = ?', [data.username], function(err, results) {
        if(results.length < 1){
            console.log('Bad Login!');
            var response = {
                type : 'badlogin',
                data : {
                    //...
                }
            }
            return response;
        }
        var player = results[0];
        var response = {
            type : 'player',
            data : {
                //...
            }
        }
        return response;
    });
}

Is there a better way of doing this? or am i missing something that is causing the objects to not return