text: class SchedulerUtil:
      """
      Auxiliary class for Google Cloud Scheduler
      """
      CRON_HEADERS = ['X-Appengine-User-Ip', 'X-Appengine-Cron']
      CRON_VALID_IPS = ['10.0.0.1', '0.1.0.1']
  
      @classmethod
      def is_cron_request(cls, request):
          """
          Verify if a flask request is generated by GCloud Cron Service
  
          "The X-Appengine-Cron header is set internally by Google App Engine. If your request handler finds
          this header it can trust that the request is a cron request. The X- headers are stripped by App Engine
          when they originate from external sources so that you can trust this header."
  
          Reference:
          https://cloud.google.com/appengine/docs/standard/python3/scheduling-jobs-with-cron-yaml#validating_cron_requests
  
          :param request: Flask Response object
          :return:        If the request was created by a google cloud cron job
          """
          headers = dict(t for t in request.headers if t[0] in cls.CRON_HEADERS)
  
          if set(cls.CRON_HEADERS) == headers.keys():
              return headers['X-Appengine-Cron'] and headers['X-Appengine-User-Ip'] in cls.CRON_VALID_IPS
  
          return False
  