<cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas' th:inline="text">
    <cas:authenticationSuccess>
        <cas:user>[[${principal.id}]]</cas:user>
        <cas:proxyGrantingTicket th:if="${pgtIou}">[[${pgtIou}]]</cas:proxyGrantingTicket>
        <cas:proxies th:if="${not #lists.isEmpty(chainedAuthentications)}">
            <cas:proxy th:each="proxy : ${chainedAuthentications}">[[${proxy.principal.id}]]</cas:proxy>
        </cas:proxies>
    </cas:authenticationSuccess>
</cas:serviceResponse>