protected String getHttpResponse(final Http userRequest) throws Exception {
        try (val request = userRequest.executeHttpRequest()) {
            return Objects.requireNonNull(request.body()).string();
        }
    }
This is {@link BaseDuoSecurityAuthenticationService}.

@author Misagh Moayyed
@since 5.1.0
support/cas-server-support-duo-core/src/main/java/org/apereo/cas/adaptors/duo/authn/BaseDuoSecurityAuthenticationService.java