Source code for action LOGIN
Ready more about how to build templates here.
<script src="<?action('UISCRIPT')?>"></script>
<div style="position: fixed; bottom: 10px; right: 10px;">
<a class="mt-auto button is-info" href="<?action('SOURCE')?>&sourceaction=<?parm('action')?>" target="_blank">See the source for this page</a>
</div>