E401 - 无法验证，您的验证令牌似乎无效

Question

I tested with Azure Packages private NPM server and now want to revert back to using the standard NPM registry but when I do it complains. I have tried everything I can think of and it is blocking me from doing any work now. I'd really appreciate any help.

The error

• npm ERR! code E401
• npm ERR, Unable to authenticate. your authentication token seems to be invalid.
• npm ERR: To correct this please trying logging in again with:
• npm ERR! npm login

If I check the log it is still, somehow, trying to find packages from Azure rather than the npm registry.

The Azure URL specified below doesnt exist in any.npmrc file or package-lock file I can find!

To be clear here I want to use the default NPM registry not Azure. eg

32 silly fetch manifest @types/angular@https://pkgs.dev.azure.com/***/***/_packaging/***.Common.UI/npm/registry/@types/angular/-/angular-1.6.45.tgz

Steps I have taken

• Deleted my local.npmrc file
• Deleted.npmrc file from my user profile
• Cleared NPM cache
• Cleared local node_modules folder
• npm config set registry https://registry.npmjs.org/
• npm config set registry https://registry.npmjs.com/
• Reinstalled node.js

In each case, running npm install still gives me the same error.

Please help!

Answer 1

Check your package.json for the node version you should be using and make sure that you are using a compatible version with nvm or something. This has been consistently the reason I have seen this error lately on my own machine.

Answer 2

.npmrc containing private repo credentials

• I had similar error. It turned out that I've saved some credentials for private repo on.npmrc file at the root of my home folder.
• So when I did npm install on my project, I get package-lock.json file contents appended with the private repo url. So this was the source of the error when deploying the project.
• What I did was to temporarily remove the.npmrc, delete package-lock.json, delete node_modules and re-run npm install.
• In my case the private repo details was not relevant for the project(so deleting.npmrc was not an issue)

Answer 3

Had similar issue, Deleting the.npmrc and then doing npm login again solved my issue, it was located in the project directory

Answer 4

Here I found very useful Microsoft documentation to get rid of this issue

Please refer to "Unable to authenticate" section https://docs.microsoft.com/en-us/azure/devops/artifacts/npm/npmrc?view=azure-devops&tabs=windows%2Cclassic

Answer 5

The credentials in the.npmrc file have an expiration time. You need regenerate these credentials.