public async Task <ActionResult <FilmModel> > AddFilm(FilmModel model)
        {
            _context.Films.Add(model);
            await _context.SaveChangesAsync();

            return(CreatedAtAction(nameof(GetFilm), new { id = model.ID }, model));
        }
        public async Task <ActionResult <CustomerModel> > AddCustomer(CustomerModel model)
        {
            _context.Customers.Add(model);
            await _context.SaveChangesAsync();

            return(CreatedAtAction(nameof(GetCustomer), new { id = model.ID }, model));
        }