Souke/domain/User/UserProducer/Event/PaymentObserver.php

<?php

namespace domain\User\UserProducer\Event;

use justcoded\yii2\eventlistener\observers\ActiveRecordObserver;
use domain\User\UserProducer\UserProducerModule;
use yii\db\AfterSaveEvent;

class PaymentObserver extends ActiveRecordObserver
{
    public function inserted(AfterSaveEvent $event)
    {
        $payment = $event->sender;
        $userProducerModule = UserProducerModule::getInstance();

        $userProducerModule->updateCredit($payment);
    }
}