Symfony\Component\Security\Http\Firewall\AbstractAuthenticationListener::attemptAuthentication PHP Method

Performs authentication.

abstract protected attemptAuthentication ( Request $request ) : Symfony\Component\Security\Core\Authentication\Token\TokenInterface
$request	Symfony\Component\HttpFoundation\Request	A Request instance
return	Symfony\Component\Security\Core\Authentication\Token\TokenInterface	The authenticated token, or null if full authentication is not possible

    abstract protected function attemptAuthentication(Request $request);

AbstractAuthenticationListener