[Bug] Invalid authentication (as an unknown user) with Azure Devops Artifacts

[IT-CASADO]

• I'd be willing to implement a fix

Describe the bug

I'm desperately trying to use Yarn 2 with a private repository from Azure Devops Artifacts.
But I'm always getting an error "Invalid authentication (as an anonymous user)"

To Reproduce

My package.json

{
	"name": "yarn2",
	"version": "1.0.0",
	"main": "index.js",
	"author": "Daniel Casado",
	"license": "MIT",
	"devDependencies": {
		"@casado/casado.editor-config": "^1.0.0"
	}
}

and .yamlrc.yml

npmScopes:
  "casado":
    npmAlwaysAuth: true
    npmRegistryServer: "https://pkgs.dev.azure.com/it-casado/apps/_packaging/casado/npm/registry"
    npmAuthToken: "MY_TOKEN_AS_BASE64"

yarnPath: ".yarn/releases/yarn-berry.js"

Note: The provided token is a read-only token to a testing repository!

I also tryied:

npmScopes:
  "casado":
    npmAlwaysAuth: true
    npmRegistryServer: "https://pkgs.dev.azure.com/it-casado/apps/_packaging/casado/npm/registry"
    npmAuthIdent: "ANY_USERNAME:MY_TOKEN_AS_BASE64"

yarnPath: ".yarn/releases/yarn-berry.js"

This token is working under NPM abd Yarn V1 (with .npmrc).

always-auth=true
@casado:registry=https://pkgs.dev.azure.com/it-casado/apps/_packaging/casado/npm/registry/

//pkgs.dev.azure.com/it-casado/apps/_packaging/casado/npm/registry/:username=it-casado
//pkgs.dev.azure.com/it-casado/apps/_packaging/casado/npm/registry/:_password=MY_TOKEN_AS_BASE64

Environment if relevant (please complete the following information):

• OS: [Windows.]
• Node version [12.17.0]
• Yarn version [2.0.0-rc.33]

See also
Azure Artifacts - Set up your client's npmrc

[IT-CASADO]

I found the solution on this issue #316:

So, after encoding <username>:<raw PAT> as base64, and putting that in the npmAuthIdent, I successfully authenticate with the server. So now ...

I only tried : for npmAuthIdent, but that doesn't work.

[manuel-mauky]

I found the solution on this issue #316:

So, after encoding <username>:<raw PAT> as base64, and putting that in the npmAuthIdent, I successfully authenticate with the server. So now ...

I only tried : for npmAuthIdent, but that doesn't work.

This info would be super helpful in the documentation of npmAuthIdent

[marksy]

I spent hours trying to get yarn 3 to auth with Azure and finally found this thread, which provided a solution ❤️