How to unlink a Twitch profile from my Epic Games account?
To unlink your current Twitch profile from Epic Games, follow this guide:
Visit your Linked accounts (Opens in a new tab) page and select Accounts at the top.
Navigate to the Twitch icon and click Unlink.
Go to your Twitch Connections page (Opens in a new tab)
Scroll down to Other Connections.
Click Disconnect.