@Override
    public String getRecaptchaResponse(final HttpServletRequest request) {
        return request.getParameter(getRecaptchaResponseParameterName());
    }
This is {@link BaseCaptchaValidator}.

@author Misagh Moayyed
@since 6.2.0
support/cas-server-support-captcha-core/src/main/java/org/apereo/cas/web/BaseCaptchaValidator.java