Java app using Organizations

Whats the best way to have a Java app that uses Organizations?
We need it to be to be “Business Users” only - no personal accounts for the login.
But once we set it to Business Users mode we can’t use the grants Client Credentials which is required by our app.
I know that having 2 separate auth0 apps might be an option (one for frontend and backend) but this could be a difficult change for us to make.
Hoping to find some other simpler options.