If you’re using DSP Dating plugin version 4.8.4 or more, You should be able to use Facebook Login feature now.
To begin using Facebook Connect you must obtain API Key and Application Secret from Facebook. To do so you should first sign in to Facebook at http://facebook.com
After signing in you need to go to https://developers.facebook.com/ and click “Add a new App” menu from My Apps menu. On this popup select website from the list of iOS, Android, Canvas and Website.
On the next screen give the name of the App and click on the ‘Create New Facebook App ID‘ Read More