curl --request POST \
  --url https://api.withflex.com/v1/exports/{id}/cancel \
  --header 'Authorization: Bearer <token>'

{
  "export": {
    "export_id": "<string>",
    "description": "<string>",
    "type": "product",
    "status": "created",
    "created_at": "<string>",
    "started_at": "<string>",
    "completed_at": "<string>",
    "metadata": {},
    "filters": {
      "payment": {
        "limit": 123,
        "status": "canceled",
        "starting_after": "<string>",
        "ending_before": "<string>",
        "customer": "<string>"
      }
    },
    "test_mode": true
  }
}