Explain how to facebook login api

[Rano]

Hi I try to use the facebook api as description here but face some difficulties:

• What is Access token provided by facebook oauth? I presume it was the token generated from https://developers.facebook.com/tools/explorer/?method=GET&path=me%3Ffields%3Did%2Cname&version=v3.3

• The secret provided by facebook for app => this is clearer, but I ask to make sure. This string get from https://developers.facebook.com/apps/[app-id]/settings/basic/ , App Secret field.

When use the 2 string above, I got this result.

{
    "status": "error",
    "message": "Service not configured"
}

[Gpopesc]

Also, you need to add the call back url in facebook app setting:
in the field : Valid OAuth Redirect URIs add
add url below

Facebook

• Callback URL: <<website_url>>/_oauth/facebook?close