Don't send scrobbles/nowPlaying updates to Last.fm if user has not authorized

core/scrobbler/interfaces.go

@@ -13,6 +13,7 @@ type Scrobble struct {
 }
 
 type Scrobbler interface {
+	IsAuthorized(ctx context.Context, userId string) bool
 	NowPlaying(ctx context.Context, userId string, track *model.MediaFile) error
 	Scrobble(ctx context.Context, userId string, scrobbles []Scrobble) error
 }