Admin user for Neo4j Aura DB

I have started a Neo4j AuraDB instance (free tier). It created a user neo4j.

I need to test and practice administering users and roles via .Net, but this user is not an administrator so it has no permissions to create or assign roles.
How can I get an admin user for this instance?

Thank you.

@pvsherman , currently RBAC is only available on Aura Enterprise tier .
Then you can do setup roles and permissions