updated ticket model to include user display_name

app/models/Ticket.php

@@ -11,10 +11,11 @@ class Ticket extends \DB\SQL\Mapper {
     public function findAll(): array
     {
         return $this->db->exec(
-            'SELECT t.* , tp.name AS priority_name, ts.name AS status_name
+            'SELECT t.* , tp.name AS priority_name, ts.name AS status_name, u.display_name
             FROM tickets  t
             LEFT JOIN ticket_priorities tp ON t.priority_id = tp.id
             LEFT JOIN ticket_statuses ts ON t.status_id = ts.id
+            LEFT JOIN users u ON t.created_by = u.id
             WHERE t.recycled = 0
             ORDER BY t.created_at DESC'
         );