Hi @steffi
What you’re asking for it totally doable, but you’ll have to glue it together yourself. There is nothing built-in for this.
As you’ve already discovered, they don’t offer this within Logic. But you can do it.
In another thread of your’s, I created a walk through showing you how to approach setting this up.
Give that a try and see if it works for you.
As of a few months ago, you couldn’t make Webflow API calls from Webflow Logic. They disabled that. I’ve haven’t tested it recently, so maybe you can now.
That said you certainly can do this with a free Make / Integromat account to substitute Logic until it’s supported.
To do this today, you’ll want to submit a native Webflow form into Make / Integromat (screencast).
Then you’ll want to trigger a Webflow Memberships invite to the email address submitted in the form:
…and within that same Make workflow, the next thing you’d do is add whatever info you link into the Webflow CMS.
Hope that helps!