解决方法cmd执行
npm config set registry https://registry.npmjs.org/
为什么，参考此文档：https://blog.csdn.net/adc_god/article/details/77989869
409 Conflict - PUT https://registry.npm.taobao.org/-/user/org.couchdb.user:zphtown - [conflict] User xxx already exists
原文：https://www.cnblogs.com/zph666/p/11739440.html
