provider

type DefaultSession struct {
	RemoteSubject     string
	ForceLocalSubject string
	Extra             interface{}
	Token             *oauth2.Token
}

type Provider interface {
	GetAuthCodeURL(state string) string
	Exchange(code string) (Session, error)
	GetID() string
}

type Registry interface {
	Find(id string) (Provider, error)
}

type Session interface {
	GetRemoteSubject() string
	GetForcedLocalSubject() string
	GetExtra() interface{}
	GetToken() *oauth2.Token
}