public async Task <IActionResult> Index(int?parentId = null, int?questionId = null, string info = null, string warning = null, string error = null)
        {
            var login = User.Identity.Name;

            ViewBag.Message    = localizer["Join tutorial"];
            ViewBag.Error      = error;
            ViewBag.Warning    = warning;
            ViewBag.Info       = info;
            ViewBag.TutorialId = parentId;
            bool onlyActive = Convert.ToBoolean(Request.Cookies[GlobalHelpers.ACTIVE]);

            ViewBag.OnlyActive = onlyActive;
            return(View(await uow.GetUserTutorialsAsync(login, onlyActive)));
        }