code: function getAuthMod () {
      let authMod = null;
      for (const m of Object.keys(ravelInstance[coreSymbols.modules])) {
        const mod = ravelInstance[coreSymbols.modules][m];
        if (Metadata.getClassMetaValue(Object.getPrototypeOf(mod), '@authconfig', 'enabled', false)) {
          authMod = mod;
          break;
        }
      }
      if (authMod === null) {
        throw new $err.NotFound('Module annotated with @authconfig is required and was not found.');
      }
  
      return authMod;
    }
docs: Retrieve the first registered Module which is decorated with `@authconfig`.
  
  @returns {Object} The first `@authconfig` `Module`.
  @private