fix: persistent sessiebeheer (remember-me), HTTPS-cookie herstel en Microsoft OAuth signed state flow

users.php

@@ -3,8 +3,9 @@
  * Fociz Team & Uitnodigingen Beheer (Enkel voor Admin)
  */
 
-require_once __DIR__ . '/includes/header.php';
+require_once __DIR__ . '/includes/auth.php';
 $adminUser = require_admin();
+$currentUser = $adminUser;
 $db = get_db_connection();
 
 $message = null;
@@ -63,6 +64,8 @@ $invites = $db->query("
     JOIN users u ON i.created_by_id = u.id 
     ORDER BY i.created_at DESC
 ")->fetchAll();
+
+require_once __DIR__ . '/includes/header.php';
 ?>
 
 <div class="space-y-6">