QuickBooks payment Integration

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C#5.0

Quickbooks

Customer CreditCard WalletAdd request to QuickBooks from Asp.net mvc

I was trying to add customer credit card details to quickbooks from C# asp.net mvc.I have written below function.But i have confused to request customer credit card details to future uses and how to generate accessToken and AccessToken Secret from the Code.The major doubt is how to request Customer CreditCard WalletAdd request.

public static void test()
{
    string accessToken = "12432543252345";
    string accessTokenSecret = "5b1cb122b340db43d4bae6bb880c8a284499";
    string consumerKey = "qyprdWTsI8u6Qq3fwiIUvkweM2mabZ";
    string consumerSecret = "9KH9mFlGy5CPSUQCOV2lM3lHGs05AK5TtdS0QLWv";

    OAuthRequestValidator oauthValidator = new OAuthRequestValidator(
    accessToken, accessTokenSecret, consumerKey, consumerSecret);

    string appToken = "5b1cb122b340db43d4bae6bb880c8a28449";
    string companyID = "32534654";
    ServiceContext context = new ServiceContext(appToken, companyID, IntuitServicesType.QBO, oauthValidator);

    DataService service = new DataService(context);

    Customer customer = new Customer
    {
        GivenName = "Mary",
        Title = "Ms.",
        MiddleName = "Jayne",
        FamilyName = "Cooper",
        Id = "1234214"
    };

    //Mandatory Fields
    customer.CCDetail.Number = "444747447474474";
    customer.CCDetail.CcExpiryMonth = 12;
    customer.CCDetail.CcExpiryYear = 2018;

    Customer resultCustomer = service.Add(customer) as Customer;
}