public ApiResponse braintreeWrapperCardCreate(
      String userPk,
      String holdrName,
      String cardNumber,
      String cardCvv,
      String cardExpirationMonth,
      String cardExpirationYear) {

    Braintree bt = new Braintree(Office.getBraintreeEncryptionKey());

    ApiRequest req =
        new ApiRequest(
            Office.getBraintreeWrapperUrl(), TDApplication.getSessionManager().getAccessToken());

    req.addGetParam("cmd", "card-create");
    req.addGetParam("version", BRAINTREE_WRAPPER_MIN_VERSION);

    req.addPostParam("customer_pk", userPk);
    req.addPostParam("card_holder_name", holdrName);
    req.addPostParam("card_number", bt.encrypt(cardNumber));
    req.addPostParam("card_expiration_month", bt.encrypt(String.valueOf(cardExpirationMonth)));
    req.addPostParam("card_expiration_year", bt.encrypt(String.valueOf(cardExpirationYear)));

    if (cardCvv != null) {
      req.addPostParam("card_cvv", bt.encrypt(cardCvv));
    }

    return doPostRequest(req);
  }