Create users by ActiveCampaign / Zapier?

Hi there
We went away from Slack because there it’s not possible to create users automatically, if something happens in ActiveCampaing (or any other system). Like each subscribed User gets a Slack-Account.

Now I gave R.C a try and the oAuth-Desaster already cause a lot of pain. In Zapier there is no activity like “create User”.

Can I create a User based on activities in ActiveCampain?