Set admin email(s) in self-hosted Grist Core

Hi! Sort of a follow up on How to change email?

If I want to make one of my other users the admin, so they can see the /admin page without resorting to a boot-key, do I need to manually modify the email of the “You” user in the home.sqlite3 file?

Or is there a way for me to use an environment variable or something to set 1 or more admins?

Thank you!