从存储库部署Lambda函数

Question

AWS新手在这里。我一直在尝试从Repository-aws-serverless-repository-api-lambda-GetOneLamb部署此Lambda函数。当我使用GET方法运行API网关时，会收到消息

  

{“消息”：“缺少身份验证令牌”}。

很多与此消息相关的论坛帖子，但我只是转圈。这里是index.js代码：

const AWS = require('aws-sdk'),
dynamoDb = new AWS.DynamoDB.DocumentClient(),
processResponse = require('./process-response'),
TABLE_NAME = process.env.TABLE_NAME,
PRIMARY_KEY = process.env.PRIMARY_KEY,
IS_CORS = process.env.IS_CORS;

exports.handler = (event) => {
    if (event.httpMethod === 'OPTIONS') {
        return Promise.resolve(processResponse(IS_CORS));
    }
    const requestedItemId = event.pathParameters.id;
    if (!requestedItemId) {
        return Promise.resolve(processResponse(IS_CORS, `Error: You missing the id parameter`, 400));
    }
    const key = {};
    key[PRIMARY_KEY] = requestedItemId;
    const params = {
        TableName: TABLE_NAME,
        Key: key
    }
    return dynamoDb.get(params)
        .promise()
        .then(response => processResponse(IS_CORS, response.Item))
        .catch(err => {
            console.log(err);
            return processResponse(IS_CORS, 'dynamo-error', 500);
        });
};