public async Task Delete(Guid stepUuid, UserHelper requestingUser)
{
EventStepDto dbEventStep = await _eventStepDal.Find(stepUuid);
EventStepUserDto dbEventStepUser = dbEventStep.EventStepUsers
.Find(esu => esu.UserUuid == requestingUser.Uuid);
if (dbEventStepUser == null)
{
throw new NoNullAllowedException();
}
await _eventStepUserDal.Remove(dbEventStepUser);
}
