docs: private static String extractPassword(String password, ClientAuthScheme scheme) {
          MessageDigest md = null;
          try {
              md = MessageDigest.getInstance(ClientAuthScheme.getDigestScheme(scheme));
          } catch (final NoSuchAlgorithmException e) {
              hostLog.l7dlog(Level.FATAL, LogKeys.compiler_VoltCompiler_NoSuchAlgorithm.name(), e);
              System.exit(-1);
          }
          final byte passwordHash[] = md.digest(password.getBytes(Charsets.UTF_8));
          return Encoder.hexEncode(passwordHash);
      }