private static void PrintAll(IActivityMonitor monitor, string key, DateTime time)
        {
            Console.WriteLine("Users for {0}", key);

            foreach (var user in monitor.GetAll(key, time))
            {
                Console.WriteLine("* {0}-{1}", user.Id, user.Name);
            }

            Console.WriteLine();
        }
        private static void PrintAll(IActivityMonitor monitor, string key, DateTime time)
        {
            Console.WriteLine("Users for {0}", key);

            foreach (var user in monitor.GetAll(key, time))
            {
                Console.WriteLine("* {0}-{1}", user.Id, user.Name);
            }

            Console.WriteLine();
        }