@Override
    public String toString() {
        return MoreObjects.toStringHelper(this)
                          .add("realm", realm)
                          .add("consumerKey", consumerKey)
                          .add("token", "****")
                          .add("signatureMethod", signatureMethod)
                          .add("signature", signature)
                          .add("timestamp", timestamp)
                          .add("nonce", nonce)
                          .add("version", version)
                          .add("additionals", additionals)
                          .toString();
    }
Returns the string that is sent as the value of the {@link HttpHeaderNames#AUTHORIZATION} header.
core/src/main/java/com/linecorp/armeria/common/auth/OAuth1aToken.java