Create Instrument for Payee

curl --request POST \
  --url https://api.antonpayments.com/v1/payees/{id}/instruments \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "method": "iban",
  "credentials": {},
  "currency": "<string>",
  "country": "<string>",
  "label": "<string>",
  "is_default": false
}
'

{
  "data": {
    "id": "ins_abc123",
    "payee_id": "<string>",
    "merchant_id": "<string>",
    "method": "iban",
    "currency": "<string>",
    "country": "<string>",
    "label": "<string>",
    "display_last4": "<string>",
    "display_bank": "<string>",
    "display_network": "<string>",
    "masked_account": "<string>",
    "status": "active",
    "is_default": true,
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z"
  }
}