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public/site/snippets/footer.php

@@ -1,7 +1,9 @@
 <script>
+  <?php if ($kirby->user()): ?>
   const kirbyData = {
     user: {
       role: '<?= $kirby->user()->role() ?>',
+      uuid: '<?= $kirby->user()->uuid() ?>',
       <?php if ($kirby->user()->role() == 'client'): ?>
         client: {
           name: '<?= $kirby->user()->client()->toPage()->title() ?>',
@@ -10,6 +12,7 @@
       <?php endif ?>
     }
   }
+  <?php endif ?>
 </script> 
 </body>
 </html>

public/site/snippets/generic-template.php

@@ -1,3 +1,9 @@
 <?php snippet('header') ?>
-  <div id="app"></div>
+<?php 
+  if ($kirby->user()) {
+    echo '<div id="app"></div>';
+  } else {
+    go($site->panel()->url());
+  }
+?>
 <?php snippet('footer') ?>