Ok... Automated create account?

My server is up and running. I have a realmlist. But I have one problem. I can't have an automated create account thing. I have to type .createaccount NAME PASSWORD EMAIL. How can I make an automated account creater so people type in their email their name and their password and it automatically creates them an account? Because I would like to make my server more popular because I have a lot of work into it and I am finally ready to let more people on. If someone can help me I will make them a GM on the server for helping me get the server started up.
:technolog:technolog:technolog:technolog:technolog:technolog:technolog:technolog:technolog:technolog