     /// Make GRAPH API's request for user's album
     ///
     /// - Parameter after: after page identifier (optional)
-    // TODO: Make after optional 
-    fileprivate func fbAlbumRequest(after: String?) {
+    fileprivate func fbAlbumRequest(after: String? = nil) {
         
         // Build path album request
         var  path = "me/albums?fields=id,name,count,cover_photo"

            // Already logged in, check User_photos permission
            if FBSDKAccessToken.current().permissions.contains("user_photos") {
                // User_photos's permission ok
                self.fbAlbumRequest(after: nil)
                completion(true, nil)
            } else {
                // User_photos's permission denied

                                                    completion(false, LoginError.PermissionDenied)
                                                } else {
                                                    // "user_photos" is granted, let's get user's pictures
                                                    self.fbAlbumRequest()
                                                    completion(true, nil)
                                                }
                                            } else {
