USERS_DIR added to config

checkAuth.php

@@ -1,9 +1,10 @@
 <?php
+require 'config.php';
 session_start();
 header('Content-Type: application/json');
 
 // Check if users.txt is empty or doesn't exist
-$usersFile = __DIR__ . '/users.txt';
+$usersFile = USERS_FILE;
 if (!file_exists($usersFile) || trim(file_get_contents($usersFile)) === '') {
     // Return JSON indicating setup mode
     echo json_encode(["setup" => true]);