public override void ViewWillAppear(bool animated)
        {
            this.Email.Background = UIImage.FromFile ("./Assets/input.png");
            this.Password.Background = UIImage.FromFile ("./Assets/input.png");
            this.Login.SetBackgroundImage (UIImage.FromFile ("./Assets/buttonlong.png"), UIControlState.Normal);

            this.Email.LeftView = new UIView (new RectangleF (0, 0, 5, 30));
            this.Email.LeftViewMode = UITextFieldViewMode.Always;
            this.Password.LeftView = new UIView (new RectangleF (0, 0, 5, 30));
            this.Password.LeftViewMode = UITextFieldViewMode.Always;

            var button = new UIBarButtonItem ("Back", UIBarButtonItemStyle.Plain, null);
            var custom = new UIButton (new RectangleF (0, 0, 26, 15));
            custom.SetBackgroundImage(UIImage.FromFile("./Assets/back.png"), UIControlState.Normal);
            custom.TouchUpInside += (sender, e) => NavigationController.PopViewControllerAnimated (true);
            button.CustomView = custom;

            this.NavigationItem.LeftBarButtonItem = button;
            this.NavigationController.SetNavigationBarHidden (false, false);

            // FACEBOOK LOGIN
            fbLogin = new FBLoginView (AppDelegate.Permissions);
            FacebookView.AddSubview (fbLogin);
            fbLogin.SizeToFit ();

            fbLogin.FetchedUserInfo += (object sender, FBLoginViewUserInfoEventArgs e) => {
                if (FBSession.ActiveSession.IsOpen) {
                    var model = new FacebookProfile { Id = long.Parse (e.User.Id), Name = e.User.Name,
                        first_name = e.User.FirstName, last_name = e.User.LastName,
                        Birthday = e.User.Birthday, Email = e.User.ObjectForKey ("email").ToString (), UserName = e.User.Username
                    };
                    var request = new RestRequest ();
                    request.RequestFinished += (object sendr, RequestEndedArgs ev) => {
                        var jsonId = (int)JsonConvert.DeserializeObject (ev.Result, typeof(int));
                        InvokeOnMainThread (delegate {
                            AppDelegate.SaveProfileId(jsonId);
                            var tabbar = new MainTabController();
                            UIApplication.SharedApplication.Delegate.Window.RootViewController = tabbar;
                        });
                    };
                    request.Send (RequestConfig.Facebook, "POST", model);
                }
            };

            fbLogin.ShowingLoggedOutUser += (object sender, EventArgs e) => {
                Console.WriteLine(e.ToString());
            };
            fbLogin.ShowingLoggedInUser += (object sender, EventArgs e) => {
                Console.WriteLine("Logged in.");
            };

            // GOOGLE LOGIN
            var signIn = SignIn.SharedInstance;
            signIn.ClientId = AppDelegate.GoogleClientId;
            signIn.Scopes = new [] { PlusConstants.AuthScopePlusLogin, PlusConstants.AuthScopePlusMe,
                                    "https://www.googleapis.com/auth/userinfo.profile",
                                    "https://www.googleapis.com/auth/userinfo.email" };
            signIn.ShouldFetchGoogleUserEmail = true;
            signIn.ShouldFetchGoogleUserId = true;

            signIn.Finished += (object sender, SignInDelegateFinishedEventArgs e) => {
                if(e.Error != null) {
                    InvokeOnMainThread(delegate {
                        new UIAlertView("Error.", "Could not sign in.", null, "Ok", null).Show();
                    });
                }
                else {
                    var request = new RestRequest();
                    request.RequestFinished += (object sendr, RequestEndedArgs ev) => {
                        var data = (GoogleClient)JsonConvert.DeserializeObject(ev.Result, typeof(GoogleClient));
                        var request2 = new RestRequest();
                        request2.RequestFinished += (object sndr, RequestEndedArgs evnt) => {
                            var jsonId = (int)JsonConvert.DeserializeObject (evnt.Result, typeof(int));
                            InvokeOnMainThread (delegate {
                                AppDelegate.SaveProfileId(jsonId);
                                var tabbar = new MainTabController();
                                UIApplication.SharedApplication.Delegate.Window.RootViewController = tabbar;
                            });
                        };
                        request2.Send(RequestConfig.Google, "POST", data);
                    };
                    request.Send(String.Format(RequestConfig.GoogleFetch, Uri.EscapeDataString(signIn.Authentication.AccessToken)), "GET");
                }
            };

            var signInButton = new SignInButton ();
            GoogleView.AddSubview (signInButton);
            signInButton.Frame = new RectangleF (0, 0, GoogleView.Frame.Size.Width - 8, GoogleView.Frame.Size.Height);
            signInButton.SizeToFit ();
        }