Upsert Payment Details

curl -X POST 'http://localhost:9000/admin/sellers/sel_01HXYZABCDEF/payment-details' \
  -H 'Authorization: Bearer <token>' \
  -H 'Content-Type: application/json' \
  -d '{
    "country_code": "de",
    "holder_name": "Acme GmbH",
    "iban": "DE89370400440532013000",
    "bic": "COBADEFFXXX"
  }'

const { seller } = await client.admin.sellers.$id.paymentDetails.mutate({
  $id: "sel_01HXYZABCDEF",
  country_code: "de",
  holder_name: "Acme GmbH",
  iban: "DE89370400440532013000",
  bic: "COBADEFFXXX",
})

{
  "seller": {
    "id": "sel_01HXYZABCDEF",
    "name": "Acme",
    "status": "open",
    "payment_details": {
      "country_code": "de",
      "holder_name": "Acme GmbH",
      "bank_name": null,
      "iban": "DE89370400440532013000",
      "bic": "COBADEFFXXX"
    },
    "updated_at": "2026-06-12T11:00:00.000Z"
  }
}