Create user in users firestore collection

Hi all, I try to create a user in my firebase users collection. Using the 'create firebase user' node I'm able to create a user in Firebase authentication, which is also visible in my firebase authentication dashboard. As next step I use 'create document' node to create a document in my users collection. For this I would like to use the email address which I used to create the user I would like to use the uid which was generated after the create user action. Somehow I'm not able to create this document in users collection using these 2 items.
Building in Flutterflow, using own firestore(not from buildship)