This page doesn't explains which client credentials we have to use.
https://developers.facebook.com/docs/authentication/applications/
https://graph.facebook.com/oauth/access_token?
client_id=YOUR_APP_ID
&client_secret=YOUR_APP_SECRET
&grant_type=client_credentials
Any clue what is that?
Does it make sense https://developers.facebook.com/docs/authentication/permissions/ also?
Thank you!