To use this plugin – your theme (or child theme) must support it.
To display additional profiles for user you just need to use native WordPress function the_author_meta( 'profile-name' ) where 『profile name』 can be 『twitter』, 『facebook』, 『googleplus』, 『instagram』, 『pinterest』.
Code example (with Font Awesome Icons):
You can see it in action here: https://pencil1.blogonyourown.com/author/robertsummer/
