My users are constantly bugging me about not being able to log in to my service as who they want, since it uses their signed in Twitch user.
A lot of broadcasters have multiple accounts, either from switching usernames or whatever, so this is a regularly occurring issue at this point.
Please make it easier for users to understand that they can switch their login during the authentication process. The tiiiiiny “not you?” has proven to not be very helpful.
Here’s just an example: