Using spark for Auth, accounts, billing for multiple first party apps

I want to use Laravel spark to handle the Auth, accounts and billing for multiple apps. These would all be billed together (as a suite of apps) and it took me about an hour to setup the views and billing like I wanted it. My question is how do I go about implementing single sign on. Can sparks built in API do this? Do I have to use passport? I’m not wanting a full Oauth2 setup with tokens. Username and password is fine because these are all first party apps and I have to manage that data anyway.