小编the*_*new的帖子

我有一个我几天前写的 lambda 函数，它在测试时表现得非常好。今天去测试后（不更改任何代码），我收到以下错误："Invalid lambda function output : Invalid JSON".

这是函数代码（Node.js 10.x）：

const AWS = require("aws-sdk");
const joi = require("@hapi/joi");

const Cognito = new AWS.CognitoIdentityServiceProvider();

exports.handler = async (event) => {
    // NOTE: Cognito expects Username to be the user's email

    // Vars
    const userPoolId = process.env.COGNITO_USER_POOL_ID;
    const {email : UNSAFE_EMAIL, language : UNSAFE_LANGUAGE = "en-US"} = event;

    // Normalize email and language
    const UNSAFE_TRIMMED_EMAIL = UNSAFE_EMAIL.trim();
    const UNSAFE_TRIMMED_LANGUAGE = UNSAFE_LANGUAGE.trim();

    // Validate UNSAFE_INPUTS
    const languageRegex = /^[a-z]{2}-[A-Z]{2}$/;

    const …