Here are the step by step instructions for how you can integrate/connect your Facebook Group with a FreshMember membership site.
Step 1: Login to Facebook and go to https://developers.facebook.com/apps/
Step 2: Click “Add a New App” and Give it a Name, Choose a Category.
Step 3: Go to the Settings >> Basic
Enter your FreshMember membership URL (ie: http://memberhacks.app.freshmember.com/ – replace memberhacks with your unique FreshMember admin login URL)
Step 4: Enter your app ID provide by Facebook in the FreshMember setup area.