private static async Task SendSimpleMessageAync(ClientMessenger client, string userId)
        {
            var result1 = await client.SendMessageAsync(userId, new TextMessage("Hi there Ross - 4!"));

            // typing on/off
            var result2 = await client.SendActionAsync(userId, SenderAction.TypingOn);

            await Task.Delay(10000);

            var result3 = await client.SendActionAsync(userId, SenderAction.TypingOff);

            var userProfile = await client.GetUserProfileAsync(userId);

            // set greeting - on first attaching
            var result10 = await client.SetGreetingTextAsync("Welcome to Hubster");

            // clear greeting
            var result11 = await client.SetGreetingTextAsync();
        }