public ActionResult AddToPocket(Transaction transaction)
        {
            if (ModelState.IsValid)
            {
                db.Transactions.Add(transaction);
                db.SaveChanges();

                var service = new PocketAccountService(db);
                service.UpdateBalance(transaction.PocketAccountId);

                return(RedirectToAction("Index", "Home"));
            }
            return(View());
        }