core-bundle/src/Security/Logout/LogoutHandler.php
public function logout(Request $request, Response $response, TokenInterface $token): void
    {
        $user = $token->getUser();

        if (!$user instanceof User) {
            return;
        }

        if (null !== $this->logger) {
            $this->logger->info(
                sprintf('User "%s" has logged out', $user->username),
                ['contao' => new ContaoContext(__METHOD__, ContaoContext::ACCESS, $user->username)]
            );
        }

        $this->triggerPostLogoutHook($user);
    }
public function logout(Request $request, Response $response, TokenInterface $token): void
    {
        $user = $token->getUser();

        if (!$user instanceof User) {
            return;
        }

        if (null !== $this->logger) {
            $this->logger->info(
                sprintf('User "%s" has logged out', $user->username),
                ['contao' => new ContaoContext(__METHOD__, ContaoContext::ACCESS, $user->username)]
            );
        }

        $this->triggerPostLogoutHook($user);
    }
{@inheritdoc}