public IActionResult Cancel(int id)
        {
            Participation deletedEvet = pRepository.DeleteParticipatedEvent(id);

            if (deletedEvet != null)
            {
                var dbEntry = ceRepository.CreatedEvents.Where(c => c.ID == deletedEvet.CreatedEventID).FirstOrDefault();
                dbEntry.CountOfParticipation -= 1;
                ceRepository.SaveEvent(dbEntry);
                // TempData["message"] = $"{deletedProduct.Title} was deleted";
            }
            return(RedirectToAction("Participated"));
        }