public IActionResult MortgageCheck([FromBody] MortgageCheckApiModel model)
        {
            var res = _mortgageService.CheckMortgage(model.Income, model.MaturityPeriod, model.LoanValue, model.HomeValue);

            if (res == null)
            {
                return(NotFound("Mortgage rate not found."));
            }

            return(Ok(new MortgageCheckViewModel {
                IsFeasible = res.IsFeasible, MonthlyCost = res.MonthlyCost
            }));
        }