Package facebook implements the OAuth2 protocol for authenticating users through Facebook. This package can be used as a reference implementation of an OAuth2 provider for Goth.
Provider is the implementation of `goth.Provider` for accessing Facebook.
New creates a new Facebook provider, and sets up important connection details. You should always call `facebook.New` to get a new Provider. Never try to create one manually.
BeginAuth asks Facebook for an authentication end-point.
Debug is a no-op for the facebook package.
FetchUser will go to Facebook and access basic information about the user.
Name is the name used to retrieve this provider later.
RefreshToken refresh token is not provided by facebook
RefreshTokenAvailable refresh token is not provided by facebook
SetCustomFields sets the fields used to return information for a user.
A list of available field values can be found at https://developers.facebook.com/docs/graph-api/reference/user
SetName is to update the name of the provider (needed in case of multiple providers of 1 type)
UnmarshalSession will unmarshal a JSON string into a session.
Session stores data during the auth process with Facebook.
Authorize the session with Facebook and return the access token to be stored for future use.
GetAuthURL will return the URL set by calling the `BeginAuth` function on the Facebook provider.
Marshal the session into a string