How to link a streaming account to your PS4 console
To broadcast, you need to link a YouTube or Twitch account to your account for PlayStation™Network. You can do this when starting a broadcast for the first time or from the home screen:
Go to Settings > Account Management > Link with Other Services.
Select Twitch and sign in to your Twitch account.
You need to set up 2FA (two-factor authentication) on your Twitch account before you start streaming.
Please protect your information, particularly sensitive or personal information such as your real name or address, while streaming. For more information, visit the PlayStation online safety guide.