getNewsletterRecipientId example

'title',
            'firstName',
            'lastName',
            'zipCode',
            'city',
            'street',
            'salutationId',
            'option',
            'storefrontUrl'
        );

        $recipientId = $this->getNewsletterRecipientId($data['email'], $context);

        if (isset($recipientId)) {
            /** @var NewsletterRecipientEntity $recipient */
            $recipient = $this->newsletterRecipientRepository->search(new Criteria([$recipientId]), $context->getContext())->first();

            // If the user was previously subscribed but has unsubscribed now, the `getConfirmedAt()`             // will still be set. So we need to check for the status as well.             if ($recipient->getStatus() !== self::STATUS_OPT_OUT && $recipient->getConfirmedAt()) {
                return new NoContentResponse();
            }
        }

        

/** * @param array<string, mixed> $stored * * @return array<string, mixed> */
    public function store(FlowEventAware $event, array $stored): array
    {
        if (!$event instanceof NewsletterRecipientAware || isset($stored[NewsletterRecipientAware::NEWSLETTER_RECIPIENT_ID])) {
            return $stored;
        }

        $stored[NewsletterRecipientAware::NEWSLETTER_RECIPIENT_ID] = $event->getNewsletterRecipientId();

        return $stored;
    }

    public function restore(StorableFlow $storable): void
    {
        if (!$storable->hasStore(NewsletterRecipientAware::NEWSLETTER_RECIPIENT_ID)) {
            return;
        }

        $storable->lazy(