public ActionResult Index([Bind(Include = "username,password")] LoginForm loginForm)
        {
            //remove existing login session
            System.Web.HttpContext.Current.Session.Remove("token");

            if (ModelState.IsValid)
            {
                WebApiHelper apiHelper = new WebApiHelper();

                //setup login data
                var formContent = new FormUrlEncodedContent(new[]
                {
                    new KeyValuePair <string, string>("grant_type", "password"),
                    new KeyValuePair <string, string>("username", loginForm.username),
                    new KeyValuePair <string, string>("password", loginForm.password),
                });

                string token = apiHelper.GetAPIToken(WebConfigHelper.WebApiBaseUrl, "/Token", formContent);

                if (!token.Contains("Error."))
                {
                    //set the login token session
                    System.Web.HttpContext.Current.Session.Add("token", token);

                    this.AddNotification("Login is successful. Welcome!.", NotificationType.SUCCESS);

                    //redirect to the root website
                    return(RedirectToAction("index", "home", new { area = "" }));
                }
            }

            this.AddNotification("Login Failed. Please try again or contact website administrator.", NotificationType.WARNING);

            return(View(loginForm));
        }