login-process.php

try {
    $user->login();
    $wf->result(
        mt_rand(),
        'Success',
        'You are now logged in',
        '',
        'icon.png'
    );
} catch ( Exception $e ) {
    $wf->result(
        mt_rand(),
        $e->getMessage(),
        $e->getMessage(),
        'Login failed. Please try again.',
        'icon.png'
    );
}