anchor.diff:               facebook_name = FacebookName,
                facebook_link = FacebookLink,
                twitter_id = TwitterId,
  -             twitter_name = TwitterName
  +             twitter_name = TwitterName,
  +             redirect_url = RedirectUrl
               }) ->
     wf:user(User),
     wf:session(user_email, Email),
  
positive.code:   facebook_name,
    facebook_link,
    twitter_id,
    twitter_name
  }).
  
  get_state() ->
  
negative.code:     facebook_name = wf:session(facebook_name),
      facebook_link = wf:session(facebook_link),
      twitter_id = wf:session(twitter_id),
      twitter_name = wf:session(twitter_name),
      redirect_url = wf:session(redirect_url)
    }.
  
  set_state(undefined) ->
  