code: def lambda_handler(event, context):
      
      print("event.session.application.applicationId=" +
            event['session']['application']['applicationId'])
  
      """
      Uncomment this if statement and populate with your skill's application ID to
      prevent someone else from configuring a skill that sends requests to this
      function.
      """
      # if (event['session']['application']['applicationId'] !=
      #         "amzn1.echo-sdk-ams.app.[unique-value-here]"):
      #     raise ValueError("Invalid Application ID")
  
      if event['session']['new']:
          on_session_started({'requestId': event['request']['requestId']},
                             event['session'])
  
      if event['request']['type'] == "LaunchRequest":
          return on_launch(event['request'], event['session'])
      elif event['request']['type'] == "IntentRequest":
          return on_intent(event['request'], event['session'])
      elif event['request']['type'] == "SessionEndedRequest":
          return on_session_ended(event['request'], event['session'])
docs: Route the incoming request based on type (LaunchRequest, IntentRequest,
      etc.) The JSON body of the request is provided in the event parameter.