IdentityModel.AspNetCore | NET Core helper library for claims-based identity | OAuth library

I'm using IdentityModel.AspNetCore to manage client access tokens in a background service. Access to the internet is only possible through a corporate proxy server which uses windows authentication.

The proxy server is configured in Windows options and the background service detects the settings, however authentication doesn't work and I'm constantly getting The proxy tunnel request to proxy 'http://proxy:8080/' failed with status code '407'. How can I configure the HttpClient to use the windows credentials for authentication against the proxy server?

I've already tried the following, but this doesn't work:

I tried to migrate my ASP CORE project to NET6 My project uses next packages

IdentityServer4.AccessTokenValidation - 3.0.1

IdentityModel.AspNetCore.OAuth2Introspection - 4.0.1

IdentityModel - 5.2.0

The build of project is success. But when I run application I get error

I have a dotnet Core web service (i.e. dotnet new webapi) that I would like to protect with reference tokens issued by a third-party IDaaS service. I've added the IdentityModel.AspNetCore.OAuth2Introspection library as well as the requisite additional code in ConfigureServices:

I'm working through the example application here: https://github.com/FusionAuth/fusionauth-example-asp-netcore and am running into a situation where the claim is present in the token issued by the OIDC provider, but is not available to the authorization policy I'm creating.

I'm using .NET core 3.1 and these are my dependencies:

I'm migrating from .net core 2.2 to 3.1 but I got this error in runtime

System.MissingMethodException: 'Method not found: 'Microsoft.Extensions.DependencyInjection.IServiceCollection Microsoft.Extensions.DependencyInjection.AuthorizationServiceCollectionExtensions.AddAuthorization(Microsoft.Extensions.DependencyInjection.IServiceCollection, System.Action`1)'.'

I made sure that I include all the needed nuget libraries

Context

There are two .NET Core 3.1 projects a Visual Studio 2019 16.7.2 solution. The class lib project has a package dependency on NuGet package AutoMapper 9.0.0 The web application project has a project dependency on the class lib.

Runtime I got the "Could not load assembly AutoMapper 9.0.0.0". My first thought was some version mismatch but all projects set to .NET Core 3.1.

I've investigated, and in the web application project /bin folder there is no AutoMapper assembly. So I've investigated further, and it seems the web app project somehow ignores this implicit dependency, see picture.

What I've tried so far:

• I've tried to clean all, then rebuild.
• I've tried to exit, then restart Visual Studio

Question

What am I missing here?

For Kirk's comment:

I am using IdentityModel.AspNetCore and .AddClientAccessTokenHandler() extension to automatically supply HttpClient with access token (at least that is what I understand I can use it for) to an API. Some API endpoints are authorized based on a role. But for some reason, the access token that is added to the request does not contain the role claim. If I do not use the .AddClientAccessTokenHandler() and manually retrieve the token and set it using SetBearerToken(accessTone) then I can reach my role authorized endpoint.

My startup is:

I am tryin to access one of protected api using client credential flow in my asp.net core 3.1 application.

For token management I am using IdentityModel.AspNetCore -1.0.0-rc.4.1.