public override void ViewDidLoad()
        {
            base.ViewDidLoad();

            Leanplum.OnVariablesChanged(() =>
            {
                btnSignIn.SetTitle(buttonTitle.StringValue, UIControlState.Normal);

                var buttonColorValue = buttonColor.StringValue;
                switch (buttonColorValue)
                {
                case Constants.RED_COLOR:
                    btnSignIn.BackgroundColor = UIColor.Red;
                    break;

                case Constants.GREEN_COLOR:
                    btnSignIn.BackgroundColor = UIColor.Green;
                    break;

                case Constants.BLUE_COLOR:
                    btnSignIn.BackgroundColor = UIColor.Blue;
                    break;
                }
            });

            btnSignIn.TouchUpInside += SignInHandler;
        }