Thanks for the clarification. The Steam ID was just an example - there’s actually quite a few things I would want to save in config, some of which would not be already connected to Twitch in any way.
It just seems odd to me that Twitch would build a tool so conceptually linked to the idea of it being hosted and managed via Twitch, but then expects one of the most fundamental parts of it to be hosted and managed externally. At least it looks like something that will be changing soon!