public ActionResult Info(EventsViewModels model)
{
var challenge = _challengeService.QueryableCustom().Where(w => w.IsActive && w.ToChallengeId == Common.CurrentUser.Id && w.UserId == model.UserId).FirstOrDefault();
challenge.IsAccepted = true;
_challengeService.Update(challenge);
_unitOfWork.SaveChanges();
return(RedirectToAction("Index"));
}