public static String getRecaptchaSiteKey(final RequestContext context) {
        val flowScope = context.getFlowScope();
        return SpringExpressionLanguageValueResolver.getInstance().resolve(flowScope.get("recaptchaSiteKey", String.class));
    }
Gets recaptcha site key.

@param context the context
@return the recaptcha site key
core/cas-server-core-web-api/src/main/java/org/apereo/cas/web/support/WebUtils.java