Symfony\Component\Security\Http\Firewall\AbstractAuthenticationListener

The AbstractAuthenticationListener is the preferred base class for all browser-/HTTP-based authentication requests.

Subclasses likely have to implement the following:
- an TokenInterface to hold authentication related data
- an AuthenticationProvider to perform the actual authentication of the
token, retrieve the UserInterface implementation from a database, and
perform the specific account checks using the UserChecker

By default, this listener only is active for a specific path, e.g.
/login_check. If you want to change this behavior, you can overwrite the
requiresAuthentication() method.