In Editor, listen to different project's PlayerMessage with access token?

I’m trying to establish communication between two projects using CloudCodeService.Instance.SubscribeToPlayerMessagesAsync()

I’m wondering if theres an approved way, to, in the Editor, pass in the access token for a player of a DIFFERENT project, such that the editor will start hearing those messages.

I see
Unity Services Web API docs
there is a REST API to get the Subscription Token from the player and projectId
https://cloud-code.services.api.unity.com/v1/projects/{projectId}/subscriptions/tokens/player
But the only place I found that uses stuff like that (the “channel” string) is deep in the low level Wire package

To confirm my understanding, you want to listen to messages from one project from another?
Further, is this at Editor-Runtime, or Editor-edition time.

Just so you know, in case, different Unity Projects can be connected to the same “cloud project”.
But a single Unity Project connected to 2 different “cloud projects” is a bit of an edge-case, you’d have to do it manually.