public async Task StartGame()
{
Guid newGame = await mgr.CreateProcess();
List <Task> promises = new List <Task>();
for (int i = 0; i < players.Count; i++)
{
promises.Add(mgr.AddPlayer(newGame, players[i]));
}
await Task.WhenAll(promises);
players.Clear();
observers.Notify((o) => o.GameStart(newGame, 0));
observers.Clear();
await mgr.StartGame(newGame);
}