ReCaptchaV3ValidationService.groovy

Flowable<Boolean> validate(String token) {
        final Map<String, String> parameters = [secret: key(SECRET), response: token]
        final HttpRequest<Map<String, String>> request = HttpRequest.POST(SITE_VERIFY_ENDPOINT, parameters).contentType(MediaType.APPLICATION_FORM_URLENCODED)
        final Flowable<HttpResponse<Map<String, ?>>> exchange = http.exchange(request, Map.class) as Flowable<HttpResponse<Map<String, ?>>>
        return exchange.map(response -> {
            final Map<String, ?> body = response.body()
            if (body == null) {
                return false
            }
            return body.getOrDefault(KEY_SUCCESS, false)
        })
    }