Authentication Error on internal nuget-Feed

Hi 😉,

I'm getting an authentication error (see below) and hope you can help me.

We use an "internal" Azure Artifact Feed for consuming our and other nuget-packages. To use this, you've to be authenticated, which is "normally" no issue inside a pipeline. Azrue DevOps use a CredentialProvider, which allows you to automatically get nuget packages from the "internal" feed.

~~~log
PopulateResources: Loaded 1 package sources from nuget.config
AddSourceRepo: adding new https://ourinternalfeed.com/nuget/v3/index.json
Error loading NuGet API Resource from url: https://ourinternalfeed.com/nuget/v3/index.json
Unable to load the service index for source https://ourinternalfeed.com/nuget/v3/index.json.

ERROR: scan failed: System.Exception: Error loading NuGet API Resource from url: https://ourinternalfeed.com/nuget/v3/index.json
---> System.AggregateException: One or more errors occurred. (Unable to load the service index for source https://ourinternalfeed.com/nuget/v3/index.json.)
---> NuGet.Protocol.Core.Types.FatalProtocolException: Unable to load the service index for source https://ourinternalfeed.com/nuget/v3/index.json.
---> System.Net.Http.HttpRequestException: Response status code does not indicate success: 401 (Unauthorized).
at System.Net.Http.HttpResponseMessage.EnsureSuccessStatusCode()
at NuGet.Protocol.HttpSource.<>c__DisplayClass15_0`1.<b__0>d.MoveNext()
--- End of stack trace from previous location ---
[...skipping 3 lines...]
at NuGet.Protocol.ServiceIndexResourceV3Provider.GetServiceIndexResourceV3(SourceRepository source, DateTime utcNow, ILogger log, CancellationToken token)
--- End of inner exception stack trace ---
at NuGet.Protocol.ServiceIndexResourceV3Provider.GetServiceIndexResourceV3(SourceRepository source, DateTime utcNow, ILogger log, CancellationToken token)
at NuGet.Protocol.ServiceIndexResourceV3Provider.TryCreate(SourceRepository source, CancellationToken token)
at NuGet.Protocol.Core.Types.SourceRepository.GetResourceAsync[T](CancellationToken token)
at NugetInspector.NugetApi.AddSourceRepo(SourceRepository source_repo) in ./nuget-inspector/NugetApi.cs:line 365
at NugetInspector.NugetApi.PopulateResources(List`1 providers, ISettings settings, Boolean with_nuget_org) in ./nuget-inspector/NugetApi.cs:line 330
at NugetInspector.NugetApi..ctor(String nuget_config_path, String project_root_path, NuGetFramework project_framework, Boolean with_nuget_org) in ./nuget-inspector/NugetApi.cs:line 62
at NugetInspector.Program.ExecuteInspector(Options options) in ./nuget-inspector/Program.cs:line 99
~~~