Login with TouchId in Appcelerator

app.js

var TiTouchId = require("ti.touchid");
var win = Ti.UI.createWindow();
var btn = Ti.UI.createButton({
    title : 'authenticate'
});

win.add(btn);
var retry = 0;
btn.addEventListener('click', function() {

    TiTouchId.authenticate({
        reason : 'We need your fingerprint to continue.',
        callback : function(e) {
            Ti.API.error("[login] >> [touchAuthCallback] >> TouchId callback execution started...");

            if (!e.success) {
                retry++;
                 
                switch(e.code) {
                case TiTouchId.ERROR_AUTHENTICATION_FAILED:
                    Ti.API.info('Error code is TiTouchId.ERROR_AUTHENTICATION_FAILED');
                    alert('Set another way to login');
                    break;
                case TiTouchId.ERROR_USER_CANCEL:
                    Ti.API.info('Error code is TiTouchId.ERROR_USER_CANCEL');
                    break;
                case TiTouchId.ERROR_USER_FALLBACK:
                    Ti.API.info('Error code is TiTouchId.ERROR_USER_FALLBACK');
                    break;
                case TiTouchId.ERROR_SYSTEM_CANCEL:
                    Ti.API.info('Error code is TiTouchId.ERROR_SYSTEM_CANCEL');
                    break;
                case TiTouchId.ERROR_PASSCODE_NOT_SET:
                    Ti.API.info('Error code is TiTouchId.ERROR_PASSCODE_NOT_SET');
                    break;
                case TiTouchId.ERROR_TOUCH_ID_NOT_AVAILABLE:
                    Ti.API.info('Error code is TiTouchId.ERROR_TOUCH_ID_NOT_AVAILABLE');
                    break;
                case TiTouchId.ERROR_TOUCH_ID_NOT_ENROLLED:
                    Ti.API.info('Error code is TiTouchId.ERROR_TOUCH_ID_NOT_ENROLLED');
                    break;
                default:
                    Ti.API.info('Error code is unknown');
                    break;
                }
            } else {
                // do something useful
                alert('YAY! success');
            }
        }
    });

});

win.open();