Get Invoice Items

[
    {
        "description": "string",
        "quantity": "string",
        "rate": "string",
        "tax": "string",
        "amount": "string",
        "product_id": 0,
        "product_name": "string",
        "unit_price": "string",
        "total_price": "string",
        "discount_percentage": "string",
        "discounted_price": "string",
        "id": 0,
        "invoice_id": 0
    }
]