Per seat billing

[timothypratley]

Feature request

• Extension name: firestore-stripe-payments

Is your feature request related to a problem? Please describe.

I'd like to offer a per-seat plan so that companies can have one paid subscription for multiple users.

Describe the solution you'd like

I'd like multiple Firebase users to be associated with a single Stripe subscription, and the price of the subscription to be relative to the number of users associated with it.

Describe alternatives you've considered

Grant users access based on some other external link.

Additional context

Team plans are a common pricing model