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      if (working) return;
      working = true;
      var $this = $(this),
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      $this.addClass('loading');
      $state.html('Authenticating');
      setTimeout(function() {
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          $state.html('Welcome back!');
          setTimeout(function() {
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              $this.removeClass('ok loading');
              working = false;
          }, 4000);
      }, 3000);
  });