Assigning users to teams thru invitation email

We’re trying to have teams on our app. We don’t want to use the auth0 ‘Organizations’ because there will not be anything custom about their experience and we’re anticipating more than 10 teams using our application. We just want to have teams where a Coach has access to only their Players (managed by roles). For now we manage the teams manually in mongodb, but we want this done automatically with auth0.
I’m wondering if it’s possible to have an invitation email sent to join the application and then the user after registering thru that link is assigned automatically to the appropriate team.