title: Devise: How do I invalidate or cancel an email confirmation token?
body: <p>In Devise 2.2.3 and Rails 3.2.x, I want to create a routine whereby users can manually invalidate a confirmation token/email that they may have sent to the wrong email address.</p>
  
  <p>I'm thinking I need to nullify the unconfirmed email and the confirmation token.  Is this right?</p>
  
  <p>I don't see anything on Google or the Devise documentation about this procedure.</p>
  
  <p>Scenario:</p>
  
  <ol>
  <li>Existing user changes their email.</li>
  <li>User realizes they just sent an email to their ex-wife. : )  Or whatever.</li>
  <li>User doesn't want ex to have control over their account.</li>
  <li>User quickly cancels the procedure, thereby protecting their security.</li>
  </ol>
  
  <p>Thanks!</p>