+ /**
+ * Update user groups in the external authentication database.
+ * Return true if successful.
+ *
+ * @param User $user
+ * @param array $addgroups Groups to add.
+ * @param array $delgroups Groups to remove.
+ * @return bool
+ */
+ public function updateExternalDBGroups( $user, $addgroups, $delgroups = array() ) {
+ return true;
+ }
+