Click Edit link and then select Use Facebook Login = Yes
Choose the Edit link.
Definition of Terms
For setting the website with Facebook, the following fields are required. They are;
Application ID and Application secret key can be obtained from the Facebook application.
Callback URL - The Callback URL denotes the site URL set within the Facebook application.
The scope 'email,read_stream,user_birthday,user_hometown,user_location' has to be included so that the app can read users profile completely. Users can change the scope according to their requirements.