FluentAuth - Google Login Setup

Need help with a couple of aspects:

1. I've the code snippet with Client ID and Secret key ready to be pasted in wp-config.php file. But it already has lot of code. Where exactly should I paste it? I'm worried as I don't wanna mess up anything in there. 😰
2. How to avoid "wp-login" and use something like "community-login"?

TIA! <3