@Override
  public PostData getPostData() {

    PostData formData =
        new PostData() {

          @Override
          public void setCredentials(String username, String password) {
            add("IDToken1", username);
            add("IDToken2", password);
          }
        };
    formData.add("IDButton");
    formData.add("goto", StringEscapeUtils.unescapeHtml(getSamlResponse()));
    formData.add("SunQueryParamsString", StringEscapeUtils.unescapeHtml(getRelayState()));
    formData.add("encoded", "true");
    formData.add("gx_charset", "UTF-8");
    formData.add("gx_charset", "UTF-8");
    return formData;
  }