I was just digging into that one. Didn't realize there was a separate authorized init call in addition to being a different URL for the subscriptions than the rest of the graphql gateway.
Got it all working now except that a couple fields (such as location) seem to constantly be null.
Anyone been able to successfully call one of the graphql subscription endpoints?
I have the mutations/queries working no problem from postman, but for some reason the subscriptions aren't cooperating.