public async Task <ActionResult> ResignOffer(int id)
        {
            string username = HttpContext.User?.Identity?.Name;

            if (await OfferAccessor.ResignOfferAsync(Context, id, username))
            {
                return(RedirectToAction("ReservedOffers", "Offer"));
            }
            else
            {
                return(View("Error"));
            }
        }