Q: about the API keys feature and using it for multi-tenancy … I take it each tenant still needs to have their own separate collection, otherwise document IDs could conflict?

@CaptainCodeman Not necessarily, you can put all tenants documents in a single collection... Unless document IDs between tenants collide on your end?

there's no guarantee they won't, so I'll create separate collections. I wondered if it worked like AppEngine Datastore where each namespace could have their own unique data, even for the same IDs

You could generate document IDs using a prefix on your side. So something like

tenantId-documentId

that would work too, and I guess give the option of querying one or all