docs: public AuthRequest renewAuth(String refreshToken) {
          Asserts.assertNotNull(refreshToken, "refresh token");
  
          String url = baseUrl
                  .newBuilder()
                  .addPathSegment(PATH_OAUTH)
                  .addPathSegment(PATH_TOKEN)
                  .build()
                  .toString();
          TokenRequest request = new TokenRequest(client, url);
          request.addParameter(KEY_CLIENT_ID, clientId);
          request.addParameter(KEY_CLIENT_SECRET, clientSecret);
          request.addParameter(KEY_GRANT_TYPE, "refresh_token");
          request.addParameter(KEY_REFRESH_TOKEN, refreshToken);
          return request;
      }