Facebook login configuration

To enable Facebook Login you just need Facebook App ID and App Secret.

how to get Facebook App ID and App Secret. 

Check this link. How to Create Facebook App, App ID, and App Secret

Note : copy redirect url from Your admin > Setting > Social login setting 

After getting App Id and App Secret, you have to set up your admin panel:

• Go to your Admin panel -> Setting -> Social Login Setting
• For Facebook: set 'Facebook App ID' and 'Facebook App Secret'
• And save your changes.