To add a new basic admin user to a provisioner, you can run the below command, substituting in the user’s email and the name of the provisioner.

step beta ca admin add <subject> <provisioner>

If you would like to confirm the current list of admins on your authority before adding new users, you can use the step beta commands to do so.

step beta ca admin list

Additional flags for list, add, remove and update operations can be found via the command reference.