fixed redirect error and added button to events.

Views/Tickets/showTickets.phtml

@@ -8,12 +8,7 @@ include dirname(__DIR__).'/header.phtml';
             <h2>Meine Tickets</h2>
         </div>
         
-        <?php if (isset($error)): ?>
-            <div class="error-box"><?= htmlspecialchars($error) ?></div>
-            <div style="text-align:center; margin-top: 1.5em;">
-                <a href="?controller=Auth&do=showLoginForm">Zum Login</a>
-            </div>
-        <?php elseif (!empty($tickets)): ?>
+        <?php if (!empty($tickets)): ?>
             <div class="event-container-inhalt">
                 <table>
                     <thead>