curl -X POST 'https://api.goatpay.com.br/v1/subaccount/portal/setup' \
  -H 'X-API-Key: gp_live_SUA_CHAVE' \
  -H 'Content-Type: application/json' \
  -d '{
    "externalReference": "loja-parceiro-a",
    "email": "operador@empresa.com",
    "password": "SenhaForte!123"
  }'

{
  "success": true,
  "message": "Portal Wallet configurado",
  "data": {
    "success": true,
    "mode": "portal_ready"
  },
  "requestId": "req_abc123"
}