public bool CreateServer(ServerModel model)
        {
            //return System.Operation.Create(() =>
            //{

            var isExists = _context.Servers.Where(c => c.ServerID == model.ServerID).FirstOrDefault();

            if (isExists != null)
            {
                throw new Exception("user email already exist");
            }
            var entity = model.Create(model);

            _context.Servers.Add(entity);
            _context.SaveChanges();
            return(true);


            //});
        }