@Override
    public Authenticator authenticate(Vertx vertx, Map<String, String> config, MultiMap headerMap, Handler<AsyncResult<Void>> resultHandler) {
        resultHandler.handle(Future.succeededFuture());
        return this;
    }
Default none auth.

@author Marc Savy {@literal <marc@rhymewithgravy.com>}
gateway/engine/vertx-polling/src/main/java/io/apiman/gateway/engine/vertx/polling/fetchers/auth/NoneAuth.java