public function onAuthenticationSuccess(AuthenticationEvent $event)
    {
        $token = $event->getAuthenticationToken();
        
        if(!$token->getRoles()) {
            return;
        }

        switch($token->getProviderKey()) {
            case "customer":
                // 会員がログインしたとき
                $User = $token->getUser();
                $Customer = $this->customerRepository->find($User->getId());
                // ログイン会員の最終ログイン日時を更新
                $now = New \DateTime();
                $Customer->setLastLoginDate($now);
                $this->entityManager->persist($Customer);
                $this->entityManager->flush();
                break;

            case "admin":
                // メンバーがログインしたとき
                break;
        }
    }

src/Eccube/Controller/Mypage/ChangeController.php

    $previous_password = $Customer->getPassword();
    $Customer->setPassword($this->eccubeConfig['eccube_default_password']);