In overall it's quite easy and requires just some adjustments in config.yml
:
hwi_oauth:
firewall_name: secured_area
resource_owners:
facebook:
type: facebook
client_id: <client_id>
client_secret: <client_secret>
infos_url: "https://graph.facebook.com/me?fields=username,name,picture.type(square)"
paths:
profilepicture: picture.data.url
More details can be found in documentation.