            BadAccessTokenEncoding => f.write_str("bad access token encoding"),
            BadSignedMessageEncoding => f.write_str("bad signed message encoding"),
            Forbidden => f.write_str("forbidden"),
            ExpiredAccessToken => f.write_str("expired access token"),
            Unauthorized => f.write_str("unauthorized"),
        }
    }
}

impl std::error::Error for Error {}