Sign in with Facebook

1. Create a new Facebook App here
2. Fill in the app details.
   
3. Select "Authenticate and request data from users with Facebook Login".
   
4. If you have a verified business, select that or choose "I don’t want to connect a business portfolio yet".
   
5. Finalize and go to dashboard.
   
6. From left panel -> click on "Use cases" -> click on "customize" under "Authentication and account creation".
   
7. Under permissions -> email -> click on "add"
   
8. Navigate to settings.
   
9. Enable "Login with the JavaScript SDK" option and add your domain name under "Allowed Domains for the JavaScript SDK". Click on save changes.
   
10. Now from app's home screen -> left panel, go to settings -> basic.
    
11. Add your website domain under APP Domains, set privacy URL, terms of service URL and add data deletion URL. click on save.
12. Save the Changes.
13. Now from app's home screen -> left panel, go to settings -> basic.
14. Copy your APP ID and APP secret
    
15. Go to your wordpress dashboard -> Social Login -> Facebook & Paste there
16. You can now login users with facebook, however you will receive a message from facebook to review your app. You will need to submit your app for verification.