AWS lambda:使用nodejs 8.1将数据写入dynamodb

以下代码在nodejs 6.1中工作正常

console.log('Starting function registration');

const AWS = require('aws-sdk');
AWS.config.update({region: 'eu-central-1'});
const docClient = new AWS.DynamoDB({apiVersion: '2012-10-08'});

exports.handler = function(event, context, callback) {

    var params = {
      'TableName' : 'services',
      'Item': {
         'name': {S: 'test'},
         'phone': {S: '0742324232'},
         'available': {BOOL: true}
         }
    };  

    docClient.putItem(params, function(err, data) {
      if (err) {
        console.log("Error", err);
        callback(err);
      } else {
        console.log("Success", data);
        callback(data);
     }});
};

但是,当尝试在nodejs 8.1样式中使用它时,它不会向数据库中写入任何内容:

console.log('Starting function registration');

const AWS = require('aws-sdk');
AWS.config.update({region: 'eu-central-1'});
const docClient = new AWS.DynamoDB({apiVersion: '2012-10-08'});

exports.handler = async (event, context, callback) => {

    var params = {
      'TableName' : 'services',
      'Item': {
         'name': {S: 'test2'},
         'phone': {S: '0742324232'},
         'available': {BOOL: false}
         }
    };  

    var {err, data} = await docClient.putItem(params);
    return data;
};

我觉得我遗漏了Async/Wait的一些用法,但是我不知道是什么。使用nodejs 8.1和lambda函数将项目写入dynamodb的正确方法是什么?