in inventory-release/main.go [106:122]
func saveTransaction(ctx context.Context, inventory models.Inventory) error {
	marshalledInventory, err := dynamodbattribute.MarshalMap(inventory)
	if err != nil {
		return fmt.Errorf("failed to DynamoDB marshal Inventory, %v", err)
	}
	_, err = dynamoDB.PutItemWithContext(ctx, &dynamodb.PutItemInput{
		TableName: aws.String(os.Getenv("TABLE_NAME")),
		Item:      marshalledInventory,
	})
	if err != nil {
		return fmt.Errorf("failed to put record to DynamoDB, %v", err)
	}
	return nil
}