1. Existing admin user adds a new user by entering their email (and possibly name and role).
2. The new user receives email with a welcome message and a link (time limited) to complete account setup.
3. After clicking the link, the user is redirected to a page where they can enter a password and/or link their social account.
4. User is redirected to the app's main page.
5. Future logins for the user will be done using their password or social account.
sendInvite functionality in the admin plugin soon but magic link or forgot password for the time being should work fine