Re: How do I allow another user to create new users?

When you say "Full Management Levels" that sounds like the Realm (account) level access. That does not give them any access to the actual app.

In the Roles for the app, you will need to create a Role for these special users, typically by copying the Participant Role and then set the checkbox for the Permissions tab for that Role to be

Manage users and share the app

The wording of that option has changed over the years so my initial wording in this thread to look for has changed.