Multiple Strategies for AshAuthentication

I am trying to migrate my current application from only allowing users to sign in with Google Auth, to also be able to create an account with username and password. I want people with just username and password to be able to optionally connect their google accounts in order to sync their calendars.

So I currently have a working setup for register_with_password and register_with_google but I’m a little unsure how I can add the option just to connect a users Google Calendar? Would I need to create another oauth strategy?

      # Current oauth2 for registering
      oauth2 :google do
        ...
        authorization_params(
          access_type: "offline",
          scope:
            "https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/userinfo.profile https://www.googleapis.com/auth/calendar"
        )

        identity_resource(MyApp.Accounts.UserIdentity)
      end

1. Do I need another oauth2 strategy that only needs the google calendar scope?
2. How do I connect this to my Phoenix/Liveview app