You can click on the Google or Yahoo buttons to sign-in with these identity providers,
or you just type your identity uri and click on the little login button.
Some users doesn't want to use the debugtoolbar or in some situation you don't want it.
This is only for the debug mod where it's activated by default if it's installed.
option -t was merged
Ticket #17243518 - latest update on 2019/11/19, created on 2019/10/15 by Laurent Peuch