public async Task Delete(int id, Order order)
{
var dbOrder = await _repo.Get(id);
if (dbOrder == null)
{
throw new Exception($"Order with id: {id} does not exist!");
}
if (dbOrder.ProcessedAt != null)
{
throw new Exception("Cannot delete an order that has already been processed!");
}
await _repo.Delete(id, order);
}