code: def event(self, request_id, trigger, event, message):
          
          self.connection.send({
              'reason': ['request', 'event'],
              'request_id': request_id,
              'content': {
                  'trigger': trigger,
                  'message': {
                      'reason': event,
                      'content': message,
                  },
              },
          })
docs: Create an event in the backend to be triggered given a circumstance.
  
          :param request_id: Request ID of a involved session.
          :param trigger: Circumstance that will trigger the event.
          :param event: Reason of the message that will be created.
          :param message: Content of the message that will be created.