public async Task <bool> Update(PizzaCollection collection)
        {
            ReplaceOneResult updateResult =
                await _db
                .Pizzas
                .ReplaceOneAsync(
                    filter : g => g.Id == collection.Id,
                    replacement : collection);

            return(updateResult.IsAcknowledged &&
                   updateResult.ModifiedCount > 0);
        }
 public async Task Create(PizzaCollection collection)
 {
     await _db.Pizzas.InsertOneAsync(collection);
 }