public IActionResult UnRSVP(int FiestaId)
        {
            int? userid   = HttpContext.Session.GetInt32("UserId");
            User userInDb = context.Users.FirstOrDefault(u => u.UserId == userid);

            if (userid == null)
            {
                return(Redirect("/"));
            }

            FiestaAndPlanner Invitee = context.FiestaAndPlanner.Where(w => w.FiestaId == FiestaId).Where(g => g.UserId == userid).FirstOrDefault();

            context.FiestaAndPlanner.Remove(Invitee);
            context.SaveChanges();
            return(Redirect("/main"));
        }
        public IActionResult RSVP(int FiestaId)
        {
            int? userid   = HttpContext.Session.GetInt32("UserId");
            User userInDb = context.Users.FirstOrDefault(u => u.UserId == userid);

            if (userid == null)
            {
                return(Redirect("/"));
            }

            FiestaAndPlanner w = new FiestaAndPlanner();

            w.FiestaId = FiestaId;
            w.UserId   = (int)userid;
            context.FiestaAndPlanner.Add(w);
            context.SaveChanges();
            return(Redirect("/main"));
        }