The situation I have is that I want to give an update to a player's Player Data (Title) a unique key and value to any new players when their account is created for the game title. I have a custom game server that I would like to be able to handle the processing to make certain they are given a unique value related to other player's data from a given segment, and that they are given that value in a specific order. So if there are 2+ players creating an account at the same time they are not given the same key value.
The plan is to setup a sort of queue system where a new player will be tossed into this queue to be handled on a first-come, first-set basis. I'd like the custom game server to be able to know when a player account has been created and give them the proper key-value. But I can't seem to locate any way of subscribing to any PlayStream event. (I found some notes on PlayFabPlayStreamAPI.Start not really being supported, and a PubSub thing that's in preview right now.) But nothing I could use immediately just to get a simple notification to the game server.
Has anyone setup something similar for this situation? Is a solution available? Or can someone write up a simple guide to getting, either from PlayFab PlayStream events or a CloudScript function, to send a message to Custom Game Server on PlayFab's Legacy Multiplayer area, please?