code: def create_route(app, engineio_server, engineio_endpoint):
      
      app.router.add_get(engineio_endpoint, engineio_server.handle_request)
      app.router.add_post(engineio_endpoint, engineio_server.handle_request)
      app.router.add_route('OPTIONS', engineio_endpoint,
                           engineio_server.handle_request)
docs: This function sets up the engine.io endpoint as a route for the
      application.
  
      Note that both GET and POST requests must be hooked up on the engine.io
      endpoint.