I wanted some help

Specifically how Twitch integration works!

From what I could understand, it is possible to assign certain servers groups to a user who is followers/subscriber/etc in Twitch ok?

I would like to understand who is responsible for verifying Twitch's api, server, or client?

I have this doubt, because I have the server with many firewall rules, in which almost everything is blocked

If anyone knows, thank you.