用户名是邪恶的。如何进行Restful Authentication只需要一个电子邮件地址和密码，而不是用户名？

As the title says: how can I use the Restful Authentication Plugin with Ruby on Rails. When I want to create a new user, it requires me to set the (wrong-named, confusing field) As the title says: how can I use the Restful Au