curl --request GET \
  --url https://partner-card.test.public.rockerapi.dev/api/engagements/card/{engagement-id}/invoices/{invoice-id} \
  --header 'Authorization: Basic <encoded-value>'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "invoiceNumber": "<string>",
  "engagementId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "dueDate": "2023-11-07T05:31:56Z",
  "billingPeriodStart": "<string>",
  "billingPeriodEnd": "<string>",
  "paymentReference": "<string>",
  "payeeAccountIdentifier": "<string>",
  "totalAmount": {
    "amount": 123,
    "currency": "<string>",
    "unit": "<string>"
  },
  "minimumAmount": {
    "amount": 123,
    "currency": "<string>",
    "unit": "<string>"
  },
  "invoicePdfDocumentId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "createdDate": "2023-11-07T05:31:56Z",
  "payeeBankIdentifier": "<string>"
}