curl --request GET \
  --url https://staging.qash.ai/api/v1/cards/balance \
  --header 'Authorization: Bearer <token>'

{
  "cardId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "balances": {
    "USD": {
      "available": 250,
      "current": 250
    }
  }
}