Scammer Using Git as CDN – What to Do?

I got an e-mail today buy someone using github as a CDN to phish passwords, pretending to be AMEX. He sent it to my "Batteries Plus" e-mail account.

Is there someone I can reach out to to shut this account down?

https://github.com/amxpdashbaord/summary/blob/main/header.js

It's a (poorly) obfuscated form whose POST goes here:

https://kbase.pratesis.com/php/init.php

or here:

https://dentalsline.com/wp-includes/ID3/id3.php

Thanks!