public async void ShouldCalcWithSucess()
        {
            var valorInicial = 100;
            var meses        = 5;
            var total        = 105.1;

            var result = await _app.CalcularJurosAsync(valorInicial, meses);

            Assert.Equal(result, total);
        }
 public async Task <double> Get(decimal valorInicial, int meses)
 {
     return(await _app.CalcularJurosAsync(valorInicial, meses));
 }