Update a gift card

import { createAdminClient } from '@spree/admin-sdk'

const client = createAdminClient({
  baseUrl: 'https://your-store.com',
  secretKey: 'sk_xxx',
})

const giftCard = await client.giftCards.update('gc_K3zr8x', {
  amount: '75.00',
})

{
  "id": "gc_UkLWZg9DAJ",
  "code": "F5061B3D9325CCD9",
  "status": "active",
  "currency": "USD",
  "amount": "75.0",
  "amount_used": "0.0",
  "amount_authorized": "0.0",
  "amount_remaining": "75.0",
  "display_amount": "$75.00",
  "display_amount_used": "$0.00",
  "display_amount_remaining": "$75.00",
  "expires_at": null,
  "redeemed_at": null,
  "expired": false,
  "active": true,
  "created_at": "2026-06-17T13:36:57.104Z",
  "updated_at": "2026-06-17T13:36:57.377Z",
  "customer_id": null,
  "created_by_id": null
}