Obter um desconto

{
  "id": "disc_Wk2p7w9WTjGFMMFL",
  "object": "discount",
  "amount_off": null,
  "applies_to": {
    "products": []
  },
  "created_at": "2026-05-21T12:00:00Z",
  "currency": null,
  "duration": "once",
  "duration_in_months": null,
  "expires_at": null,
  "is_active": true,
  "livemode": true,
  "max_redemptions": null,
  "metadata": {},
  "name": "Black Friday 20%",
  "percent_off_basis_points": 2000,
  "redemptions_count": 0,
  "starts_at": null,
  "type": "percentage",
  "updated_at": null,
  "valid": true
}

{
  "error": {
    "code": "authentication_failed",
    "message": "Invalid API key provided.",
    "type": "authentication_error"
  }
}

{
  "error": {
    "code": "resource_missing",
    "message": "Discount not found.",
    "param": "id",
    "type": "invalid_request_error"
  }
}