在Hapi中，如何访问get方法的请求有效负载

const Hapi = require('@hapi/hapi');

const init = async () => {
  const server = Hapi.server({
    port: 3000,
    host: 'localhost'
  });

  server.route({
    method: 'GET',
    path: '/example',
    handler: (request, h) => {
      const payload = request.payload;
      return `Payload: ${payload}`;
    }
  });

  await server.start();
  console.log('Server running on %s', server.info.uri);
};

init();