public Domain.Meetup Handle(CreateMeetupCommand command)
{
var meetupId = _repository.GetNextId();
var meetup = new Domain.Meetup(
meetupId,
command.HostUserId,
command.Name,
command.SeatsAvailable);
_repository.Add(meetup);
_readModelUpdater.OnCreate(meetup);
_repository.Commit();
return(meetup);
}