我在公司VPN后面运行npm install，并且遇到以下错误：
request to http://registry.npmjs.org/yarn failed, reason: getaddrinfo
EAI_AGAIN registry.npmjs.org:80
npm ERR! code ETIMEDOUT
npm ERR! errno ETIMEDOUT
npm ERR! network request to http://registry.npmjs.org/yarn failed, reason:
connect ETIMEDOUT 104.17.19.33:443
npm ERR! network This is a problem related to network connectivity.
npm ERR! network In most cases you are behind a proxy or have bad network
settings.
npm ERR! network
npm ERR! network If you are behind a proxy, please make sure that the
npm ERR! network 'proxy' config is set properly. See: 'npm help config'
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\blah\AppData\Roaming\npm-cache\_logs\2018-09-
24T14_21_25_097Z-debug.log
我尝试了以下方法，但都没有解决方法：
npm config delete http-proxy
npm config delete https-proxy
npm config rm proxy
npm config rm https-proxy
我无法安装任何软件包，不确定如何解决？
如何找到我的代理地址？