问腾讯云demo三木聊天室登录时收到错误提示？

LoginError {type: "ERR_LOGIN_MISSING_SESSION", message: "{"code":-1,"error":"ERR_WHEN_INSERT_TO_DB\nError: …r user 'root'@'localhost' (using password: YES)"}"}message: "{"code":-1,"error":"ERR_WHEN_INSERT_TO_DB\nError: ER_ACCESS_DENIED_ERROR: Access denied for user 'root'@'localhost' (using password: YES)"}"type: "ERR_LOGIN_MISSING_SESSION"__proto__: Erro

    at http://1783067285.appservice.open.weixin.qq.com/vendor/wafer2-client-sdk/lib/login.js:18:28

    at http://1783067285.appservice.open.weixin.qq.com/vendor/wafer2-client-sdk/lib/login.js:22:2

    at require (http://1783067285.appservice.open.weixin.qq.com/appservice:26:21982)

    at http://1783067285.appservice.open.weixin.qq.com/appservice:26:21731

    at http://1783067285.appservice.open.weixin.qq.com/vendor/wafer2-client-sdk/index.js:4:13

    at require (http://1783067285.appservice.open.weixin.qq.com/appservice:26:21982)

    at http://1783067285.appservice.open.weixin.qq.com/appservice:26:21731

    at http://1783067285.appservice.open.weixin.qq.com/app.js:7:14

    at require (http://1783067285.appservice.open.weixin.qq.com/appservice:26:21982)

    at http://1783067285.appservice.open.weixin.qq.com/appservice:37:9

/server/config.js

mysql: {

host: 'localhost',

port: 3306,

user: 'root',

db: 'cAuth',

pass: 'xxxxxxxxxxxxxx',//密码没有问题，已经通过腾讯云验证

char: 'utf8mb4'

},

/client/config.js

var host = 'xxxxxxxxxx';

var config = {

// 下面的地址配合云端 Demo 工作

service: {

host,

// 登录地址，用于建立会话

loginUrl: `https://${host}/weapp/login`,

// 测试的请求地址，用于测试会话

requestUrl: `https://${host}/weapp/user`,

// 测试的信道服务地址

tunnelUrl: `https://${host}/weapp/tunnel`,

// 上传图片接口

uploadUrl: `https://${host}/weapp/upload`

}

};