title: How to debug devise/warden?
body: <p>I am trying to setup devise in my rails app.  It was working nicely, but now I am not able to login as any of my users I get 'Invalid email or password.'  I would like to get more insight why its not authenticating.</p>
  
  <p>Is there any devise configuration settings that shed some more light?  i.e. what is the query being used to find the user, et c ...</p>
  
  <p>Thanks!</p>