public async Task <IActionResult> StartRental(int?id)
        {
            try
            {
                await _rentalsService.StartRental(id);
            }
            catch (ArgumentException e)
            {
                return(NotFound(e.Message));
            }
            catch (InvalidOperationException e)
            {
                return(StatusCode(StatusCodes.Status405MethodNotAllowed, e.Message));
            }
            catch (Exception e)
            {
                return(BadRequest(e.Message));
            }

            return(Ok());
        }