code: private boolean isValidSystemCredentials(String userid, String password) {
          String superUser = ServerParams.instance().getModuleParamString("DoradusServer", "super_user");
          String superPassword = ServerParams.instance().getModuleParamString("DoradusServer", "super_password");
          return Utils.isEmpty(superUser) ||
                 Utils.isEmpty(superPassword) ||
                 (superUser.equals(userid) && superPassword.equals(password));
      }
docs: Return true if the given userid/password are valid system credentials.