<?php if (Auth::LoggedIn() == true) { ?>
<div class="blueIce-block clearfix">
<div class="blueIce-blockheader">
<h3 class="t">Discord</h3>
</div>
<div class="blueIce-blockcontent" align="center">
<iframe src="https://discord.com/widget?id=937311209793912923&theme=dark" width="240" height="500" allowtransparency="true" frameborder="0" sandbox="allow-popups allow-popups-to-escape-sandbox allow-same-origin allow-scripts"></iframe>
</div>
</div>
<?php } ?>
Something like this should do the trick.