curl --request GET \
  --url https://sandbox.layerfi.com/v1/businesses/{businessId}/invoices/ar-aging \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "type": "AR_Aging_Report",
    "start_date": "2023-11-07T05:31:56Z",
    "end_date": "2023-11-07T05:31:56Z",
    "as_of_date": "2023-11-07T05:31:56Z",
    "customers": [
      {
        "customer_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "customer_name": "<string>",
        "current": [
          {
            "invoice_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
            "customer_name": "<string>",
            "due_at": "2023-11-07T05:31:56Z",
            "invoice_total": 123,
            "outstanding_balance": 123
          }
        ],
        "buckets": [
          {
            "bucket_start_day": 123,
            "bucket_end_day": 123,
            "invoices": [
              {
                "invoice_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
                "customer_name": "<string>",
                "due_at": "2023-11-07T05:31:56Z",
                "invoice_total": 123,
                "outstanding_balance": 123
              }
            ]
          }
        ],
        "total_outstanding_balance": 123
      }
    ],
    "totals": {
      "current_total": 123,
      "bucket_totals": [
        {
          "bucket_start_day": 123,
          "bucket_end_day": 123,
          "total": 123
        }
      ],
      "grand_total": 123
    }
  }
}