public void StartPoker(PokerUser user, string description)
        {
            var session = GetSession(user);

            if (!EnsureSession(user))
            {
                return;
            }
            if (!EnsureMasterUser(user))
            {
                return;
            }
            if (!session.CanStartPoker)
            {
                messageSender.PokerAlreadyRunning(user.ChatId);
            }
            session.StartPoker();
            messageSender.SendPokerToUsers(session.AllUsers, description);
        }