YumAuthController.php - loginByDebug - $user = $this->getUser($this->loginForm->username);

[d3artagnan]

Scenario:
config: debug => true

then use login widget, for quick login
input:
username: use not exists user name
password: any

$user = $this->getUser($this->loginForm->username);
$identity = new YumUserIdentity($user->username, 'foobar');

$user will be null, since $this->getUser will have no value