Subscribing users

Hi there! We have a registration form on our WordPress site. Whenever a user registers we’d like to add his email to a chosen list. We’ve searched the Klaviyo API and we found that we can use this - https://developers.klaviyo.com/en/reference/create_client_subscription.

Can you help us and confirm if we should use this? We tried adding the nessary data to the script in the article above but then when we try to execute it on successful registration we get a fulfilled promise but nothing really happens in the list, the profile is not there.

We tried running this script with an email that we have access to, but haven’t received anything yet.

What should we do?

Thanks!

Kind regards.