code: private List<NameValuePair> getUrlParameters(String action, String token, String redirectUri) {
          List<NameValuePair> urlParameters = new ArrayList<NameValuePair>();
          if (action == "revoke") {
              urlParameters.add(new BasicNameValuePair("token", token));
          } else if (action == "refresh") {
              urlParameters.add(new BasicNameValuePair("refresh_token", token));
              urlParameters.add(new BasicNameValuePair("grant_type", "refresh_token"));
          } else {
              urlParameters.add(new BasicNameValuePair("code", token));
              urlParameters.add(new BasicNameValuePair("redirect_uri", redirectUri));
              urlParameters.add(new BasicNameValuePair("grant_type", "authorization_code"));
          }
          return urlParameters;
      }
docs: Method to build post parameters
  
  @param action
  @param token
  @param redirectUri
  @return