anchor.diff:  
         if (serverdata['ok'] == 'no') {
           print('Error:Server refused the login attempt.');
  +        _loginButton.hidden = false;
           return;
         }
   
  
positive.code:   AuthManager() {
      // Starts the game
      _loginButton = querySelector('#login-button');
      _personaNavigator = new Persona('', verifyWithServer, _logout);
      _loginButton.onClick.listen((_) {
        _personaNavigator.request({
          'backgroundColor': '#4b2e4c',
          'siteName': 'Children of Ur'
        });
      });
    }
  
    void verifyWithServer(String personaAssertion) {
      HttpRequest.request(_authUrl + "/login", method: "POST", requestHeaders: {
        "content-type": "application/json"
      }, sendData: JSON.encode({
  
negative.code:       _personaNavigator.logout();
        window.location.reload();
    }
  }
  