setDoubleOptinRegister example

$doubleOptinRegister = $doubleOptinWithAccount || $doubleOptInAccountless;
        $shop = $context->getShop();
        $shop->addAttribute('sendOptinMail', new Attribute([
            'sendOptinMail' => $doubleOptinRegister,
        ]));

        $customer->setReferer((string) $session->offsetGet('sReferer'));
        $customer->setValidation((string) ($data['register']['personal']['sValidation'] ?? ''));
        $customer->setAffiliate((int) $session->offsetGet('sPartner'));
        $customer->setPaymentId((int) $session->offsetGet('sPaymentID'));
        $customer->setDoubleOptinRegister($doubleOptinRegister);
        $customer->setDoubleOptinConfirmDate(null);

        /** @var Enlight_Event_EventManager $eventManager */
        $eventManager = $this->get('events');

        $errors = ['occurred' => false];
        $errors = $eventManager->filter(
            'Shopware_Modules_Admin_SaveRegister_BeforeRegister',
            $errors,
            [
                'customer' => $customer,