public async Task MustGetSingleZipCodeObjectAsync()
        {
            var actual = await _service.GetAddressAsync <List <SmartyStreetsModel> >(ZipCodeTest);

            Assert.IsType <List <SmartyStreetsModel> >(actual);
            Assert.Equal(ExpectedCity, actual[0].CityStates[0].City);
            Assert.Equal(ExpectedState, actual[0].CityStates[0].StateAbbreviation);
        }