not a twitch dev, but based on documentation right now you have to do it through you own hosting.
You would use their API endpoint if you want to block wrongly configured apps (you have to tell twitch if config is ok to go)
Twitch hosted config is on the todo list: https://trello.com/c/88minYsr/22-extensions-configuration-service
I would guess we will get it at some point, hopefully not to long from now.