text: 
  # login methods are dynamically imported if auth is enabled
  
  import logging
  
  from .logout import Logout
  
  import tornado.web
  import _
  
  @_.components.Register('auth')
  class Authentication(tornado.web.RequestHandler):
      @classmethod
      def _pyConfig(cls, config):
          cls.URL = config.pop('login_page', '/login')
  