Zapier: how do have newly created user get added to a group called "PAID MEMBERS"

Hi everyone — hoping someone can point me in the right direction.

I have a paid membership app ($5/month) set up using:

  • Stripe (for subscriptions)

  • Zapier (to automate user creation)

  • Softr native user authentication (not Airtable users)

The current flow works successfully:
Stripe checkout → Zapier creates the user in Softr.

The issue I’m running into:

I cannot find a way for Zapier to automatically add the newly created user to my Softr user group called “PAID MEMBERS.”

I’m using Softr’s built-in user management because I want to rely on the native visibility controls in pages and blocks to restrict access behind the paywall.

However, the Zapier Softr integration does not appear to include an “Add User to Group” action.

Has anyone solved this cleanly while keeping:

  • Softr native users

  • Stripe subscriptions

  • Zapier automation

  • Group-based visibility rules for gated content

Is the recommended approach to use condition-based groups with a custom user field? Or is there another supported way to programmatically assign a user to a group after Stripe checkout?

Appreciate any guidance — thank you!