Redirect to (*) on /login if user is already logged in

[rwxzig]

When the use is logged in, and somehow navigates again at /login, the current behaviour is that it prompts again for credentials. As @Skrypt mentioned in Discord, this may be a desired behaviour as the user might want to switch to a different account.
Alternatively, you can let the user know that it is already logged in and ask to switch account, link to log out or redirect to either user account, or where it came from with a notification "already logged in".

[Piedone]

Do you want to track this as a feature request?