public IActionResult Get(string start, string end)
        {
            try
            {
                var      culture   = CultureInfo.CreateSpecificCulture("en-EN");
                DateTime startTime = DateTime.Parse(start, culture);
                DateTime endTime   = DateTime.Parse(end, culture);

                return(new OkObjectResult(_customers.GetCustomersFromInterval(startTime, endTime)));
            }
            catch (Exception)
            {
                return(new BadRequestResult());
            }
        }