With using a private Nuget Feed (Azure DevOps) we get an 401 Unauthorized error

We use create the BOM file of our .NET projects by using cyclonedx-dotnet. Because of we publish now private nuget packages to our own feed, we changed the nuget.config to use the custom feed
```cmd
docker run --rm -v c:\source\repos\symbio-base:/home/docker/data/ cyclonedx/cyclonedx-dotnet /home/docker/data/Symbio.Base.sln -o /home/docker/data/src/bom/dotnet/ -dgl -us test -usp MY_AUTH_TOKEN
```
MY_AUTH_TOKEN is a token from me (project collection admin) and has full access. Only to be sure, that is not an authentication problem. In the Azure DevOps pipeline by using $(System.AccessToken) its not running, too. But we use this connection already for the build stage, there the nuget restore is working.
```
error NU1301: Unable to load the service index for source https://pkgs.dev.azure.com/COMPANY/_packaging/FEEDNAME/nuget/v3/index.json.
/usr/share/dotnet/sdk/8.0.100/NuGet.targets(156,5): error : Unable to load the service index for source https://pkgs.dev.azure.com/COMPANY/_packaging/FEEDNAME/nuget/v3/index.json.
error : Response status code does not indicate success: 401 (Unauthorized).
```