public void AddAlarmClock(Guid userGuid, DBModels.AlarmClock clock)
 {
     using (var context = new AlarmClockDbContext())
     {
         var user = context.Users.Include(i => i.AlarmClocks)
                    .FirstOrDefault(u => u.Guid == userGuid);
         if (user != null)
         {
             user.AlarmClocks.Add(clock);
             context.SaveChanges();
         }
         else
         {
             throw new ArgumentException("Couldn't find user with that guid");
         }
     }
 }
 public void AddAlarmClock(Guid userGuid, DBModels.AlarmClock clock)
 {
     service.AddAlarmClock(userGuid, clock);
 }