How to change HTML and CSS for sign-up/in/out

[rubenlpz]

Hi, just wondering if it's possible to change the html and css of pages for sign-in, sign-out, sign-up. I don't know where are this pages located.

[chip]

I know this is old, but for anyone interested, I found cloning this repo to my project's packages directory worked, as described in this SO post. HTH.