protected void Page_Load(object sender, EventArgs e)
        {
            access_token = Request.QueryString["access_token"];
            access_token_text.InnerHtml = access_token;
            clientConfig = new PayWithAmazon.CommonRequests.Configuration();

            clientConfig.WithAccessKey(ConfigurationManager.AppSettings["access_key"])
                .WithSecretKey(ConfigurationManager.AppSettings["secret_key"])
                .WithMerchantId(ConfigurationManager.AppSettings["merchant_id"])
                .WithClientId(ConfigurationManager.AppSettings["lwa_client_id"])
                .WithSandbox(true)
                .WithRegion(Regions.supportedRegions.us);

            client = new Client(clientConfig);
            Session.Add("PayWithAmazon_clientObj", client);
        }
        protected void Page_Load(object sender, EventArgs e)
        {
            access_token = Request.QueryString["access_token"];
            access_token_text.InnerHtml = access_token;
            clientConfig = new PayWithAmazon.CommonRequests.Configuration();

            clientConfig.WithAccessKey(ConfigurationManager.AppSettings["access_key"])
            .WithSecretKey(ConfigurationManager.AppSettings["secret_key"])
            .WithMerchantId(ConfigurationManager.AppSettings["merchant_id"])
            .WithClientId(ConfigurationManager.AppSettings["lwa_client_id"])
            .WithSandbox(true)
            .WithRegion(Regions.supportedRegions.us);

            client = new Client(clientConfig);
            Session.Add("PayWithAmazon_clientObj", client);
        }