How to save username or channel id of our website user in our database to stream their channel on twitch

[BarryCarlyon]

@rocks

I want to develop an application where registered user of my application can stream their gaming sessions on twitch.

@rocks

,Is compulsory for user to login to twitch (in my application) before starting streaming

If they don’t login and/or register you have no information about them, so how are you supposed to get their user ID without registration and/or login with Twitch?