title: Ruby on rails: Devise, want to add invite code?
body: <p>I would like to add an invite_code requirement for users to sign up. Ie. in addition to requiring them to specify an email/password combo, I want an additional field :invite_code. This is a temporary fix so that non-wanted users cannot login during a given alpha period. </p>
  
  <p>I'm confused since Devise doesn't add controllers. I'm sort of familiar with the concept of virtual attributes, and it strikes me that I could add a :invite_code to the model, and then just hard code a step now where it says invite code must equal 12345 or whatever for now.</p>
  
  <p>Does this make sense with devise authentication? And how do I go approaching this from a proper rails restful approach?</p>
  
  <p>Thank you very much.</p>