title: Rails 3.1 Active Admin gem: how to manage Admin Users
body: <p>The question for those, who had worked with Active Admin gem:</p>
  
  <p>I just don't get how should I make a <strong>sign up</strong> and <strong>change password</strong> functions for admin users? Can I do this using Active Admin interface?</p>
  
  <p>Thanks in advance.</p>