Streaming gameplay to Twitch is a popular way of sharing your gameplay experiences with friends and other gamers.
Instead, you oughta provide a Stream key which is a long and randomly generated API token.
you better keep this stream key private as anyone that has it can stream to your account.
To do so, tap on your profile picture in the top-right corner, then tap on Creator Dashboard.
select your profile picture, then Creator Dashboard to be able to access your stream key.
Once in the Creator Dashboard, expand the Preferences category in the left column, then select Channel.
This will generate a new stream key and invalidate your old one.
you might find your stream key in the Channel Preferences.
