### 获取auth的引用

```js
const tcb = require('@cloudbase/node-sdk');
const app = tcb.init({env:'xxx', credentials:'xxx'})
const auth = app.auth();
```

#### 获取用户信息

```js
const {
  openId, //微信openId，非微信授权登录则空
  appId, //微信appId，非微信授权登录则空
  uid, //用户唯一ID
  customUserId //开发者自定义的用户唯一id，非自定义登录则空
} = auth.getUserInfo()
```

#### 获取客户端IP
```js
const ip = auth.getClientIP()
```

#### 获取自定义登录的登录凭据ticket

```js
const customUserId = '123456' // 开发者自定义的用户唯一id

const ticket = auth.createTicket(customUserId, {
  refresh: 3600 * 1000, // access_token的刷新时间
})
```