Associate guest cart with authenticated user

import { createSpreeClient } from '@spree/sdk'

const client = createSpreeClient({
  baseUrl: 'https://your-store.com',
  publishableKey: '<api-key>',
})

const cart = await client.store.cart.associate({
  bearerToken: '<token>',
  orderToken: 'GUEST_ORDER_TOKEN',
})

{
  "id": "or_UkLWZg9DAJ",
  "number": "R767761099",
  "state": "cart",
  "token": "JNzv8nEcTLnNMvhB9SnraBJSpoMHg9SKS5E",
  "email": "desiree.sauer@brakusjacobs.us",
  "special_instructions": null,
  "currency": "USD",
  "locale": "en",
  "item_count": 1,
  "state_lock_version": 0,
  "shipment_state": null,
  "payment_state": null,
  "item_total": "10.0",
  "display_item_total": "$10.00",
  "ship_total": "100.0",
  "display_ship_total": "$100.00",
  "adjustment_total": "0.0",
  "display_adjustment_total": "$0.00",
  "promo_total": "0.0",
  "display_promo_total": "$0.00",
  "tax_total": "0.0",
  "display_tax_total": "$0.00",
  "included_tax_total": "0.0",
  "display_included_tax_total": "$0.00",
  "additional_tax_total": "0.0",
  "display_additional_tax_total": "$0.00",
  "total": "110.0",
  "display_total": "$110.00",
  "completed_at": null,
  "created_at": "2026-03-05T10:12:55.302Z",
  "updated_at": "2026-03-05T10:12:55.361Z",
  "order_promotions": [],
  "line_items": [
    {
      "id": "li_UkLWZg9DAJ",
      "variant_id": "variant_UkLWZg9DAJ",
      "quantity": 1,
      "currency": "USD",
      "name": "Product 35507",
      "slug": "product-35507",
      "options_text": "",
      "price": "10.0",
      "display_price": "$10.00",
      "total": "10.0",
      "display_total": "$10.00",
      "adjustment_total": "0.0",
      "display_adjustment_total": "$0.00",
      "additional_tax_total": "0.0",
      "display_additional_tax_total": "$0.00",
      "included_tax_total": "0.0",
      "display_included_tax_total": "$0.00",
      "promo_total": "0.0",
      "display_promo_total": "$0.00",
      "pre_tax_amount": "10.0",
      "display_pre_tax_amount": "$10.00",
      "discounted_amount": "10.0",
      "display_discounted_amount": "$10.00",
      "display_compare_at_amount": "$0.00",
      "created_at": "2026-03-05T10:12:55.337Z",
      "updated_at": "2026-03-05T10:12:55.337Z",
      "compare_at_amount": null,
      "thumbnail_url": null,
      "option_values": [],
      "digital_links": []
    }
  ],
  "shipments": [
    {
      "id": "ship_UkLWZg9DAJ",
      "number": "H44992416560",
      "state": "pending",
      "tracking": "U10000",
      "tracking_url": null,
      "cost": "100.0",
      "display_cost": "$100.00",
      "shipped_at": null,
      "created_at": "2026-03-05T10:12:55.342Z",
      "updated_at": "2026-03-05T10:12:55.359Z",
      "shipping_method": {
        "id": "shpm_UkLWZg9DAJ",
        "name": "UPS Ground",
        "code": "UPS_GROUND"
      },
      "stock_location": {
        "id": "sloc_UkLWZg9DAJ",
        "state_abbr": "STATE_ABBR_45",
        "name": "Karma VonRueden",
        "address1": "1600 Pennsylvania Ave NW",
        "city": "Washington",
        "zipcode": "20500",
        "country_iso": "US",
        "country_name": "United States of America",
        "state_text": "STATE_ABBR_45"
      },
      "shipping_rates": [
        {
          "id": "shpr_UkLWZg9DAJ",
          "shipping_method_id": "shpm_UkLWZg9DAJ",
          "name": "UPS Ground",
          "selected": true,
          "cost": "100.0",
          "display_cost": "$100.00",
          "shipping_method": {
            "id": "shpm_UkLWZg9DAJ",
            "name": "UPS Ground",
            "code": "UPS_GROUND"
          }
        }
      ]
    }
  ],
  "payments": [],
  "bill_address": {
    "id": "addr_EfhxLZ9ck8",
    "firstname": "John",
    "lastname": "Doe",
    "full_name": "John Doe",
    "address1": "47 Lovely Street",
    "address2": "Northwest",
    "city": "Herndon",
    "zipcode": "35005",
    "phone": "555-555-0199",
    "company": "Company",
    "country_name": "United States of America",
    "country_iso": "US",
    "state_text": "STATE_ABBR_47",
    "state_abbr": "STATE_ABBR_47",
    "quick_checkout": false,
    "state_name": "STATE_NAME_47"
  },
  "ship_address": {
    "id": "addr_VqXmZF31wY",
    "firstname": "John",
    "lastname": "Doe",
    "full_name": "John Doe",
    "address1": "48 Lovely Street",
    "address2": "Northwest",
    "city": "Herndon",
    "zipcode": "35005",
    "phone": "555-555-0199",
    "company": "Company",
    "country_name": "United States of America",
    "country_iso": "US",
    "state_text": "STATE_ABBR_48",
    "state_abbr": "STATE_ABBR_48",
    "quick_checkout": false,
    "state_name": "STATE_NAME_48"
  },
  "payment_methods": []
}