users.ddl in lhm-2.0.0

- old
+ new

@@ -6,7 +6,9 @@
   `created_at` datetime DEFAULT NULL,
   `comment` varchar(20) DEFAULT NULL,
   `description` text,
   PRIMARY KEY (`id`),
   UNIQUE KEY `index_users_on_reference` (`reference`),
-  KEY `index_users_on_username_and_created_at` (`username`,`created_at`)
+  KEY `index_users_on_username_and_created_at` (`username`,`created_at`),
+  KEY `index_with_a_custom_name` (`username`,`group`)
+
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8