Hi @David_Shrem,
Webflow alone will not be enough, for now.
You may want to wait Webflow user system but we lack data on what features the system will have and when such system will be available. Vlad did let us know a bit about ETA in a last post.
There’s https://www.cloudcanal.io/ that will come with a https://bubble.io/ backend tool for Webflow.
These days, the only workflow I see that would correspond to your idea is the one showcased in this blog article:
https://webflow.com/blog/how-to-create-a-membership-website
Which requires Memberstack, Zapier and Jetboost.