使用环境: node.js, 使用了NODE.JS SDK,版本 7.2.2 sdk 安装方式: ``` yarn add qiniu ``` 以下代码是typescript代码 ``` import * as qiniu from 'qiniu' const qiniu_credentials = new qiniu.Credentials(qiniu_ak, qiniu_sk) ``` 提示: Property 'Credentials' does not exist on type 'typeof import("/xxxx/node_modules/qiniu/index")'