Show a custom field definition

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

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

const definition = await client.customFieldDefinitions.get('cfd_UkLWZg9DAJ')

{
  "id": "cfdef_UkLWZg9DAJ",
  "namespace": "specs",
  "key": "fabric",
  "label": "Title",
  "field_type": "short_text",
  "resource_type": "Spree::Product",
  "storefront_visible": true,
  "created_at": "2026-06-16T13:22:10.522Z",
  "updated_at": "2026-06-16T13:22:10.522Z"
}