JsonNode call(final String url) throws Exception {
        val conn = (HttpURLConnection) new URI(url).toURL().openConnection();
        if (conn instanceof final HttpsURLConnection urlConnection) {
            urlConnection.setSSLSocketFactory(this.context.getSocketFactory());
        }
        conn.setRequestMethod(HttpMethod.GET.name());
        try (var input = conn.getInputStream()) {
            return MAPPER.readTree(input);
        }
    }
Call url.

@param url the url
@return the json node
@throws Exception the exception
support/cas-server-support-inwebo-mfa/src/main/java/org/apereo/cas/support/inwebo/service/InweboService.java