private void CleanUp(CongregatioServiceClient client, Event @event, User attendee)
{
var user = @event.User;
@event.Attendees = new List<User>();
client.UpdateEvent(@event);
attendee.AttendedEvents = new List<Event>();
client.UpdateUser(attendee);
@event = client.GetEventByIdLong(@event.Id);
attendee = client.FindUserById(attendee.UserId);
client.RemoveUser(attendee);
client.RemoveEvent(@event);
user = client.FindUserById(user.UserId);
client.RemoveUser(user);
}