I'm trying to authenticate using the Model in Alloy. I have been trying to figure this problem out since yesterday. If anybody could help me, I'd really appreciate it. So, I have a view login.xml, then a controller login.js. The login.js contains the following function:

var user = Alloy.Models.user; //my user.js model
function login(e) {
    if($.username.value !== '' && $.password.value !== ''){
        if(user.login($.username.value, $.password.value)){
            Alloy.createController('home').getView().open();
            $.login.close();
        }
    }else{
        alert('Username and/or Password required!');
    }
}

Then in my user.js model, it's like this:

extendModel : function(Model) {
    _.extend(Model.prototype, {
        login: function(username, password) {
            var first_name, last_name, email;
            var _this = this;
            var url = 'http://myurl.com/test.php';
            var auth = Ti.Network.createHTTPClient({
                onerror: function(e){
                    alert(e.error);
                },
                onload: function(){
                    var json = this.responseText;
                    var response = JSON.parse(json);
                    if(response.logged == true){
                        first_name = response.f_name;
                        last_name = response.l_name;
                        email = response.email;
                        _this.set({
                            loggedIn: 1,
                            username: email,
                            realname: first_name + ' ' + last_name,
                            email: email,
                        });
                        _this.save();
                    }else{
                        alert(response.message);
                    }
                },
            });

            auth.open('POST', url);
            var params = {
                usernames: username,
                passwords: password,
            };
            auth.send(params);
            alert(_this.get('email')); //alert email
        },
    });

When I click on login in login.xml it calls the function login in index.js. So, now my problem is that, when I click the button for the first time, I get an empty alert from alert(_this.get('email')), but then when I click the button the second time, everything works fine, it alerts the email. I have no idea what's going on. Thank you for the help.