AKKA HTTP身份验证失败拒绝原因

我已经创建了一个指令来验证JWT令牌:

  def authenticated: Directive[Unit] = optionalHeaderValueByName("Authorization")
    .flatMap[Unit] {
      case Some(token) => Jwt.decode(token, "secret", Seq(JwtAlgorithm.HS256)) match {
        case Failure(_: JwtExpirationException) =>
          // TODO the rejection handler needs to know that the token is expired.
          reject(AuthenticationFailedRejection(CredentialsRejected, HttpChallenge("JWT", None)))
        case Failure(_: JwtException) =>
          // TODO the rejection handler needs to know that the token is invalid.
          reject(AuthenticationFailedRejection(CredentialsRejected, HttpChallenge("JWT", None)))
        case Success(_) =>
          // TODO read token and validate user id
          pass
      }
      case None => reject(AuthenticationFailedRejection(CredentialsMissing, HttpChallenge("JWT", None)))
}

问题是,它们只是两个原因: CredentialsRejected 和 CredentialsMissing . 我需要能够添加一个额外的拒绝原因来显示令牌是否过期。但原因都来自一个封闭的类,所以我不能自己制造。

是否有方法创建自定义原因或向 拒绝证书 原因所以有可能检查拒绝的原因吗?