static async Task Main(string[] args)
{
// The port number(5001) must match the port of the gRPC server.
using var channel = GrpcChannel.ForAddress("https://localhost:5001");
var client = new Greeter.GreeterClient(channel);
var reply = await client.AddPost();
Console.WriteLine("Post added");
Console.WriteLine("Press any key to exit...");
Console.ReadKey();
}