+ provider :openid, openid_options
+ provider :google_oauth2, Settings.google_auth_id, Settings.google_auth_secret, google_options if Settings.key?(:google_auth_id)
+ provider :facebook, Settings.facebook_auth_id, Settings.facebook_auth_secret, facebook_options if Settings.key?(:facebook_auth_id)
+ provider :windowslive, Settings.windowslive_auth_id, Settings.windowslive_auth_secret, windowslive_options if Settings.key?(:windowslive_auth_id)
+ provider :github, Settings.github_auth_id, Settings.github_auth_secret, github_options if Settings.key?(:github_auth_id)
+ provider :mediawiki, Settings.wikipedia_auth_id, Settings.wikipedia_auth_secret, wikipedia_options if Settings.key?(:wikipedia_auth_id)