FE Self-Registration & OneAll

[TheLastLegion]

I have both required modules for front end users
Front-End Users module ( http://dev.cmsmadesimple.org/project/files/14 ) and Self-Registration Module ( http://dev.cmsmadesimple.org/project/files/15 )

So just using fe self-registration and trying to figure out how to integrate OneAll social login (they have 21+ social networks and it seems like it'd be a great idea)... Working their guide, I was going through it and had a question on a particular part
From: http://docs.oneall.com/plugins/guide/setup/

First I want to make sure the steps I took were right, am a bit of a newb but learn fast

the id that identifies users is "username" in the cms_module_feusers_users table

In the next section they explain, to add certain functions
would those functions be added to SelfRegistration\functions.php ?
And what would those function parameters be for cmsms

If anyone be willing to guide me a little, I'd highly appreciate it