require_once(__DIR__ . '/vendor/autoload.php'); use Delight\Auth\Auth; // Connect to database $dsn = 'mysql:host=localhost;dbname=mydatabase;charset=utf8mb4'; $username = 'myusername'; $password = 'mypassword'; $pdo = new PDO($dsn, $username, $password); // Create instance of Auth $auth = new Auth($pdo); // Get unique user ID $userId = $auth->getUserId(); // Use Auth ID to validate user if ($auth->isLoggedIn()) { // User is authorized, perform action here } else { // User is not authorized, redirect to login page }In this example, we first connect to a database and then create an instance of the Auth class using the PDO library. We then use the Auth object to get the user ID and validate whether the user is logged in or not. Overall, PHP packages and libraries that implement Auth ID authentication can provide a simple and secure solution for user authentication in web applications.