extension.cs

public class UserTokenExtensionProvider : IExtensionConfigProvider
{
    private readonly IConfiguration _configuration;
    public UserTokenExtensionProvider(IConfiguration configuration)
    {
        _configuration = configuration;
    }
    public void Initialize(ExtensionConfigContext context)
    {
        var serviceCollection = new ServiceCollection();
        serviceCollection.RegisterDependencies();
        serviceCollection.AddSingleton<IConfiguration>(_configuration);
        var serviceProvider = serviceCollection.BuildServiceProvider();
        context.AddBindingRule<UserTokenAttribute>().Bind(new UserTokenBindingProvider(serviceProvider));
    }
}