private static async Task <GetCreditCardResponse> GetCreditCardAsync(ICartaoProtegidoClient client, string token)
        {
            var request = new GetCreditCardRequest
            {
                JustClickKey = token,
                RequestId    = Guid.NewGuid()
            };

            return(await client.GetCreditCardAsync(request));
        }
        private static async Task <SaveCreditCardResponse> SaveCreditCardAsync(ICartaoProtegidoClient client)
        {
            var request = new SaveCreditCardRequest
            {
                CustomerName           = "Bjorn Ironside",
                CustomerIdentification = "762.502.520-96",
                CardHolder             = "BJORN IRONSIDE",
                CardExpiration         = "10/2025",
                CardNumber             = "1000100010001000",
                JustClickAlias         = DateTime.Now.Ticks.ToString()
            };

            return(await client.SaveCreditCardAsync(request));
        }