<?php
require 'app/Core/Database.php';
$db = App\Core\Database::getInstance()->getConnection();
try {
    $stmt = $db->query('DESCRIBE admin_users');
    print_r($stmt->fetchAll(PDO::FETCH_ASSOC));
} catch (Exception $e) {
    echo "Table admin_users might not exist: " . $e->getMessage();
}
