GoogleSocialPlugin
From Smart Job Board help
Smart Job Board Help > GoogleSocialPlugin
Google Social Plug-in allows users registering and signing in to a job board easily using their Google account.
Note: to see the way this feature works for users click here.
To get to the plug-in settings go to Admin Panel >> System Configuration >> Plugins >> GoogleSocialPlugin (edit).
On the opened page you will see the following form:
Select the User Group(s) that will be allowed to use Google login/registration. Use the "Control" key to choose two or more items.
Then press Apply or Save to save the settings.
Note: use "Apply" button to save the changes and stay on the current page.

