docs: protected static String utcNow() {
  
      Calendar calendar = Calendar.getInstance();
      SimpleDateFormat dateFormat = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss z", Locale.US);
      dateFormat.setTimeZone(TimeZone.getTimeZone("GMT"));
      return dateFormat.format(calendar.getTime());
      // return java.time.format.DateTimeFormatter.RFC_1123_DATE_TIME.format(
      //    ZonedDateTime.now(ZoneOffset.UTC));
    }