+        } else if (operation instanceof SynchronizeFolderOperation) {
+            onSynchronizeFolderOperationFinish((SynchronizeFolderOperation)operation, result);
+
+        }
+    }
+
+    protected void requestCredentialsUpdate() {
+        Intent updateAccountCredentials = new Intent(this, AuthenticatorActivity.class);
+        updateAccountCredentials.putExtra(AuthenticatorActivity.EXTRA_ACCOUNT, getAccount());
+        updateAccountCredentials.putExtra(
+                AuthenticatorActivity.EXTRA_ACTION, 
+                AuthenticatorActivity.ACTION_UPDATE_EXPIRED_TOKEN);
+        updateAccountCredentials.addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
+        startActivity(updateAccountCredentials);