Is there a shortcode for login with facebood that can be used in a widget?

I am using the plugin Sidebar login Version 2.3.2 that creates a widget for handling the login/register/logged in info in my theme. This plugin is handy to allow me to present the user with a login/register tab and then some info / links post login.

What I would like to do is add a 'login with facebook' button to this widget, and then post login allow the sidebar functionality to present the information/graphics. Is there some short code that I could use in this widget to accomplish this?

cheers,