public ActionResult Save([FromBody] UserAccount form)
        {
            UserAccount entity = form.Id.HasValue ? _dbContext.UserAccounts.Find(form.Id.Value) : _dbContext.Add(new UserAccount()).Entity;

            entity.Username = form.Username;
            entity.Password = form.Password;
            entity.Role     = form.Role;
            _dbContext.SaveChanges();
            return(new OkResult());
        }