I formulated the answer. Here it is. This Code need to be placed in Each Field's Default Value to call the specific Data:
$jfbcLibrary = JFBCFactory::provider('facebook');
$json = $jfbcLibrary->api('/me/?fields=first_name,last_name,email');
$email = $json['email'];
I'm sorry for the delayed response in getting back to you! Yes, the above is the proper way to call the Facebook API to get user information. I'm glad you got it going, but if you need anything else, please let us know and we'll gladly help however we can.