Board Thread:Support Requests - Getting Technical/@comment-92.220.57.64-20200513235151/@comment-9605025-20200514011753

That is odd you can't create an account using the "Login with Twitch" button. Given that you can do it for Google and Facebook, I would have thought it would be the same. That said, maybe it is an issue with Twitch's login service? I know Fandyllic reported login issues after connecting his Twitch account (see here). Although, ironically, his issues were with Gamepedia, not Fandom.

Regarding "using a Twitch account", I would like to clarify something. None of the "login with" option use your other account as for Fandom account. "Login with Facebook" doesn't use you Facebook account, "Login with Google" doesn't use your Google account, and "Login with Twitch" doesn't use your Twitch account. In all cases, the Fandom account is still a separate account.

What these "login with" services do is use these other accounts of yours as password managers. Your Fandom account is created with a username and a "password" set by Facebook/Google/Twitch (the service). When you login, the service asks for your service username and password. If you enter them correctly, the service lets Fandom know that you are the right person and that you should be logged into your Fandom account.

Because your accounts are technically separate, having your Fandom account deleted won't delete your service account and vice versa. A common mistake is to think you can log into Fandom directly using you service password. This is not true. This issue typically comes up when users try to change either their username or password. Here is a recent example of a user that got confused by this.