docs: public Request<Void> revokeToken(String refreshToken) {
          Asserts.assertNotNull(refreshToken, "refresh token");
  
          String url = baseUrl
                  .newBuilder()
                  .addPathSegment(PATH_OAUTH)
                  .addPathSegment(PATH_REVOKE)
                  .build()
                  .toString();
          VoidRequest request = new VoidRequest(client, url, "POST");
          request.addParameter(KEY_CLIENT_ID, clientId);
          request.addParameter(KEY_CLIENT_SECRET, clientSecret);
          request.addParameter(KEY_TOKEN, refreshToken);
          return request;
      }