public async Task <IActionResult> Index([FromQuery] CalculoTaxaDeJurosRequest model)
        {
            if (model == null)
            {
                return(BadRequest("É necessário informar um modelo válido."));
            }

            if (ModelState.IsValid)
            {
                return(Ok(await _taxaDeJurosService.CalculaTaxaDeJuros(model)));
            }
            else
            {
                return(BadRequest(model));
            }
        }