curl -X GET 'https://api.goatpay.com.br/v1/subaccount/get-by-ref/loja-parceiro-a' \
  -H 'X-API-Key: gp_live_SUA_CHAVE'

{
  "success": true,
  "message": "Subconta",
  "data": {
    "id": "clx_subconta",
    "name": "Loja Parceiro A",
    "externalReference": "loja-parceiro-a",
    "status": "ACTIVE",
    "lockMode": "NONE",
    "balance": {
      "spendablePadrao": 1500
    }
  },
  "requestId": "req_abc123"
}