This is a bit of a followup to #225 (closed).

We have a /api/v1.0/members endpoint which apparently lists all usernames for users that are in some team.

This is used only for the team members view, when you want to invite someone, for the autocompletion.

I want to make sure if this is how it's supposed to work: list only users that are in some team?

Also, the /members endpoint is a bit misleading. I would move this to GraphQL team under all_members for example, as part of API cleanup.