wrapper.php

<?php

if ($message = $lia->getRedirectMessage()){
    //ideally, this would be set to some value that the theme can use
    //Then it's up to the theme to display important messages, instead of the individual script.
    //That also means there's more setup required in order to use the User App
    //So I'm thinking... maybe it would be better to just print it here.
    //I could also make a theme for the User app which would have the message box
    //Then that theme would be shown inside the site theme
    // but then I have to set up app-specific theming that can stack with other apps' themes.
    echo "<div class='message'>{$message}</div>";
}

echo $content;