'Unable to Authenticate' when trying to connect to Azure DevOps Artifacts feed through npm; I get an E401 error

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'Unable to Authenticate' when trying to connect to Azure DevOps Artifacts feed through npm; I get an E401 error

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I had an issue where I couldn't connect, even though I had the same .npmrc as other repos on the same machine.
Running `vsts-npm-auth -config .npmrc` just exited, presumably happy with the cached credentials.

However, the credentials it had seemed to be bad. The solution was to force refreshing the token:
`vsts-npm-auth -config .npmrc -force`