Get payment setup session

import { createClient } from '@spree/sdk'

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

const session = await client.customer.paymentSetupSessions.get('pss_abc123', {
  token: '<token>',
})

{
  "id": "pss_UkLWZg9DAJ",
  "status": "pending",
  "external_id": "seti_test_7ac50408dcea6ac09aa04e3d",
  "external_client_secret": "seti_secret_77e80c695165694be5ef56b9",
  "external_data": {
    "client_secret": "secret_123"
  },
  "payment_method_id": "pm_UkLWZg9DAJ",
  "payment_source_id": null,
  "payment_source_type": null,
  "customer_id": "cus_UkLWZg9DAJ",
  "payment_method": {
    "id": "pm_UkLWZg9DAJ",
    "name": "Credit Card",
    "description": null,
    "type": "bogus",
    "session_required": true,
    "source_required": true
  }
}