docs: public static byte[] getHashedPassword(ClientAuthScheme scheme, String password) {
          if (password == null) {
              return null;
          }
  
          MessageDigest md = null;
          try {
              md = MessageDigest.getInstance(ClientAuthScheme.getDigestScheme(scheme));
          } catch (NoSuchAlgorithmException e) {
              e.printStackTrace();
              System.exit(-1);
          }
          byte hashedPassword[] = null;
          hashedPassword = md.digest(password.getBytes(Constants.UTF8ENCODING));
          return hashedPassword;
      }