curl --location --globoff 'https://developers.flouci.com/api/v2/bindings/list?client_id=<UNIQUE_INTERNAL_ID>' \
  --header 'Authorization: Bearer <PUBLIC_KEY>:<PRIVATE_KEY>'

{
  "result": {
    "success": true,
    "bindings": [
      {
        "binding_id": "6255d6ea-0e38-4b3e-98a6-fc4afa673f9f",
        "client_id": "3f861af8-0f0c-34ef-8c88-d8d110952ef7",
        "card_last_four": "4012",
        "card_brand": "Visa",
        "status": "active",
        "created_at": "2025-01-15T10:30:00Z"
      }
    ]
  },
  "status": "success"
}

{
  "result": {
    "status": 400,
    "message": "Invalid client_id"
  }
}