REGISTER APP https://developers.facebook.com/apps 1. Add new app 2. Add product: Facebook Login SET SETTINGS 1. My App > Settings > Basic > Domains > example.com 2. My App > Settings > Basic > URL site > https://example.com 3. Facebook Login > Settings > Use Strict Mode for Redirect URIs(always Enabled) 4. Facebook Login > Settings > Valid OAuth redirect URIs > https://example.com/auth/facebook/callback 5. Facebook Login > Settings > Deauthorize Callback URL > https://example.com/auth/facebook