public IActionResult GetById(int id)
        {
            var result = _creditScoreService.GetById(id);

            if (result.Success)
            {
                return(Ok(result));
            }
            else
            {
                return(BadRequest(result));
            }
        }
        private IResult CheckCreditScoreSufficiency(Rental rental)
        {
            var car    = _carService.GetById(rental.CarId).Data;
            var credit = _creditScoreService.GetById(rental.CustomerId).Data;

            if (credit == null)
            {
                return(new ErrorResult(Messages.CreditScoreInvalid));
            }
            if (credit.MinCreditScore < car.MinCreditScore)
            {
                return(new ErrorResult(Messages.CreditScoreIsNotEnough));
            }

            return(new SuccessResult());
        }