public List<Waitlist> GetWaitList()
 {
     var errors = new List<string>();
     var repository = new WaitlistRepository();
     var service = new WaitlistService(repository);
     return service.GetWaitlist(ref errors);
 }
        public string InsertWaitlist(Waitlist waitlist)
        {
            var errors = new List<string>();
            var repository = new WaitlistRepository();
            var service = new WaitlistService(repository);

            service.InsertWaitlist(null, ref errors);
            if (errors.Count == 0)
            {
                return "ok";
            }

            return "error";
        }
        public string UpdateStudent(Waitlist waitlist)
        {
            var errors = new List<string>();
            var repository = new WaitlistRepository();
            var service = new WaitlistService(repository);

            service.UpdateWaitlist(waitlist, ref errors);

            if (errors.Count == 0)
            {
                return "ok";
            }

            return "error";
        }