AddUserAccessTokenHttpClient - no accessible extension method

[jupiter144]

I installed the Duende.AccessTokenManagement v3.20 package from Nuget. I am experimenting with using this package.

I am able to implement AddClientCredentialsTokenManagement in Program.cs. When typing builder.Services.AddUserAccessTokenHttpClient() as documented I get a compiler error: no accessible extension method AddUserAccessTokenHttpClient could be found. What am I missing?

[maartenba]

Can you check if you have a using Duende.AccessTokenManagement.OpenIdConnect; in your Program.cs?

Also make sure to reference the Duende.AccessTokenManagement.OpenIdConnect NuGet package.

[jupiter144]

That worked, thank you, but when I call CreateClient("apiClient") in my controller I get an error:
System.InvalidOperationException: 'No service for type 'Duende.AccessTokenManagement.IDPoPProofService' has been registered.'

[maartenba]

Can you add a builder.Services.AddOpenIdConnectAccessTokenManagement() as well? This should register the required services with the service provider.