private static @NotNull String hash(@NotNull String s) {
    MessageDigest md5 = DigestUtil.md5();
    StringBuilder sb = new StringBuilder();
    byte[] digest = md5.digest(s.getBytes(StandardCharsets.UTF_8));
    for (byte b : digest) {
      sb.append(Integer.toHexString(b));
    }
    return sb.toString();
  }
private static @NotNull String hash(@NotNull String s)