docs: public String getAvatarHash() {
          byte[] bytes = getAvatar();
          if (bytes == null) {
              return null;
          }
  
          MessageDigest digest;
          try {
              digest = MessageDigest.getInstance("SHA-1");
          }
          catch (NoSuchAlgorithmException e) {
              LOGGER.log(Level.SEVERE, "Failed to get message digest", e);
              return null;
          }
  
          digest.update(bytes);
          return StringUtils.encodeHex(digest.digest());
      }