<PackageReference Include="System.ClientModel" Version="1.14.0" />

System.ClientModel.Primitives.CredentialResolverEngine

Internal core resolution logic shared by the public GetCredentialSettings overloads, GetClientSettings<T> overloads, and the DI AddClient auto-resolve hook.
namespace System.ClientModel.Primitives { internal static class CredentialResolverEngine { public static CredentialSettings Resolve(IConfigurationSection credentialSection, IEnumerable<CredentialResolver> resolvers, Action<IConfigurationSection> configureOverrides); } }