public IActionResult Index()
        {
            string username = HttpContext.Session.GetString("username");

            if (username != null && username != "")
            {
                return(View(sheetService.FilterByUser(username)));
            }

            return(RedirectToAction("Login", "Home"));
        }
        public IActionResult Index()
        {
            string username = HttpContext.Session.GetString("username");

            return(View(sheetService.FilterByUser(username)));
        }