I see that facebook require now to have access_token for searching users. I'm folowwing these links: https://developers.facebook.com/docs/facebook-login/access-tokens/
User access token for search via facebook graph
They are saying the same, that I can use "&access_token=app_id|app_secret" for querying the Graph API, I still get an error "error": { "message": "(#200) Must have a valid access_token to access this endpoint", "type": "OAuthException", "code": 200 }
I need to search facebook users from my web site, I don't need user of my web site to login to facebook.
Thank you