hi, im evaluating some authprovider for an upcomming project. for this, i have some question regarding supertokens. We have not fully decided, but tend to go selfhosted. 1. The app will have multi tenancy, how fast can the licence scale on demand -> pay as you go oder do this upfront? 2. whats ment with

No. of Apps / Envs in one core

in the pricing page? 3. how easy it is to scale on the selfhosted variant? Estimated are 50k MaU by the end of this year and if it goes well 1 million by the end of next year. 4. is it possible to use supertokens as auth provider for other services, like using it as authprovider in a cms like directus for some specific roles (something like an AD).