Registering a “typed” gRPC client with the ASP.NET Core DI container

I have a GrpcService class the takes in gRPC client in its constructor, like so:

public class GrpcService : IService 
{
    private readonly GrpcClient grpcClient;
 
    public GrpcService(GrpcClient grpcClient)
    {
        this.grpcClient = grpcClient;
    }
    
    //...
}

I have registered the gRPC client in the Startup class by using the generic AddGrpcClient extension method:

services.AddGrpcClient<GrpcClient>(o =>
{
    o.Address = new Uri("https://localhost:5001");
});

Now I want to inject the GrpcService class into a API controller. My question is; what's is the correct way to register the GrpcService in the Startup class?

I did try the following, which did not work:

services.AddGrpcClient<GrpcService>(); 

At the moment I have the following code, which works fine:

services.AddSingleton<IService, GrpcService>();

However, I'm not certain using a singleton is the correct lifetime to use, in particular as the gRPC client uses HttpClient internally?

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