无法将“ firebase”识别为内部或外部命令，可操作程序或批处理文件。在Windows命令提示符下

Question

安装Node.js并在命令提示符下执行命令后

npm install -g firebase-tools

所以，这东西出来了

npm ERR! path C:\Users\XPENDER\AppData\Roaming\npm\firebase
npm ERR! code EEXIST
npm ERR! Refusing to delete C:\Users\XPENDER\AppData\Roaming\npm\firebase: node_modules/firebase-tools/lib/bin/firebase.js symlink target is not controlled by npm C:\Users\XPENDER\AppData\Roaming\npm\node_modules\firebase-tools
npm ERR! File exists: C:\Users\XPENDER\AppData\Roaming\npm\firebase
npm ERR! Move it away, and try again.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\XPENDER\AppData\Roaming\npm-cache\_logs\2019-03-21T18_08_50_912Z-debug.log

然后执行firebase login结果

'firebase' is not recognized as an internal or external command, operable program or batch file.

那么登录将如何成功？