/ar/invoices/:id

{  
  "id": string,  
  "dueDate": date,  
  "invoiceDate": date,  
  "invoiceNumber": string,
  "poNumber": string | null,  
  "payerMemo": string | null,   
  "internalNote": string | null, 
  "customerId": string,
  "ccEmails": [string | null],  
  "slug": string,   
  "status": "Unpaid" | "Paid" | "Cancelled",
  "amount": decimal,  
  "destinationAccountId": string, 
  "creditCardEnabled": boolean,  
  "achDebitEnabled": boolean,  
  "useRealAccountNumber": boolean,
  "lineItems": [  
    {  
      "name": string,
      "unitPrice": decimal,
      "quantity": number,
      "salesTaxRate": number | null,   
    }
  ],
  "createdAt": date-time,
  "updatedAt": date-time,
  "canceledAt": date-time | null,
}