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当我尝试连接到 mysql rds 代理时，出现连接超时。我遵循了这个教程

这是我的代码

import mysql2 from 'mysql2';
import AWS from 'aws-sdk';
const getConnection = async () => {
    const signer = new AWS.RDS.Signer({
        username: 'my-user-name',
        hostname: 'proxy-name.proxy-someid.us-east-1.rds.amazonaws.com',
        port: 3306
    });

    console.info('Connecting to MySQL proxy via IAM authentication');

    const rdsSignerAuth = () => () => {
        console.info('CALL rdsSignerAuth');
        return signer.getAuthToken({
            username: 'my-user-name',
            region: 'us-east-1',
            hostname: 'proxy-name.proxy-someid.us-east-1.rds.amazonaws.com',
            port: 3306
        });
    };

    let connection;
    try {
        connection = await mysql2.createConnection({
            host: 'proxy-name.proxy-someid.us-east-1.rds.amazonaws.com',
            user: 'my-user-name',
            database: 'database-name',
            connectTimeout: 60000,
            ssl: { …