public async Task <IActionResult> PutCustomer(int id, CustomerDto customer)
        {
            Customer c = CustomerDto.FromCustomerDto(customer);

            if (id != c.Id)
            {
                return(BadRequest());
            }

            _context.Entry(c).State = EntityState.Modified;

            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!CustomerExists(id))
                {
                    return(NotFound());
                }
                else
                {
                    throw;
                }
            }

            return(NoContent());
        }
        public async Task <ActionResult <CustomerDto> > PostCustomer(CustomerDto customer)
        {
            Customer c = CustomerDto.FromCustomerDto(customer);

            _context.Customers.Add(c);
            await _context.SaveChangesAsync();

            return(CreatedAtAction("GetCustomer", new { id = customer.Id }, CustomerDto.ToCustomerDto(c)));
        }