curl --request GET \
  --url https://api.example.com/api/admin/billing/invoices \
  --cookie better-auth.session_token=

[
  {
    "id": "<string>",
    "ownerType": "user",
    "ownerId": "<string>",
    "periodYear": 123,
    "periodMonth": 123,
    "periodStart": "<string>",
    "periodEnd": "<string>",
    "currency": "<string>",
    "lineItems": [
      {
        "resourceType": "<string>",
        "resourceId": "<string>",
        "billingType": "hourly",
        "quantity": 123,
        "ratePerUnit": 123,
        "amount": 123,
        "resourceLabel": "<string>"
      }
    ],
    "subtotal": 123,
    "tax": 123,
    "total": 123,
    "status": "draft",
    "createdAt": "<string>",
    "updatedAt": "<string>",
    "issuedAt": "<string>",
    "voidedAt": "<string>",
    "notes": "<string>"
  }
]