anchor.diff:  
       authPlugins _ =
           [ authBrowserId def
  -        , authGoogleEmail
  +        , authGoogleEmail clientId clientSecret
           ]
   
       authHttpManager = httpManager
  
positive.code: 
  === Authenticate Me
  
  Let's jump right in with an example of authentication.
  
  [source, haskell]
  ----
  
negative.code: import           Yesod
  import           Yesod.Auth
  import           Yesod.Auth.BrowserId
  import           Yesod.Auth.GoogleEmail2
  
  
  -- Replace with Google client ID.
  clientId :: Text
  clientId = ""
  
  -- Replace with Google secret ID.
  clientSecret :: Text
  clientSecret = ""
  
  data App = App
      { httpManager :: Manager
  