static async Task Main()
{
using var channel = GrpcChannel.ForAddress("https://localhost:5001");
var client = new ChatService.ChatServiceClient(channel);
// Enter name
Console.Write("Enter user name to join chat: ");
_userName = Console.ReadLine();
// Create duplex chat rpc stream
using var chatStream = client.Chat();
// Wire up CallbackHandler to ResponseStream - print chant messages from service
var callbackHandler = new CallbackHandler(chatStream.ResponseStream);
// Send init-message to join the chat
await chatStream.RequestStream.WriteAsync(new ChatMessage { User = _userName, Text = string.Empty });
// Run input loop
await InputLoop(chatStream);
// Run callback loop
await callbackHandler.Task;
}