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

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

// An existing customer becomes a member immediately; an unknown email
// becomes an invitation (check the returned id prefix: cmem_ vs cinv_).
const member = await client.companies.memberships.create('comp_86Rf07xd4z', {
  customer_email: 'buyer@example.com',
})

spree api post /companies/{company_id}/memberships -d '{"customer_email":"buyer@example.com"}'

{
  "id": "cmem_UkLWZg9DAJ",
  "company_id": "comp_UkLWZg9DAJ",
  "customer_id": "cust_UkLWZg9DAJ",
  "email": "buyer@example.com",
  "created_at": "2026-01-15T12:00:00.000Z",
  "updated_at": "2026-01-15T12:00:00.000Z"
}