curl --request GET \
  --url https://api.aries.com/v1/accounts/{id}/balances \
  --header 'Authorization: Bearer <token>'

{
  "accountId": "<string>",
  "groupId": "<string>",
  "credit": "<string>",
  "creditRemaining": "<string>",
  "excess": "<string>",
  "maintReq": "<string>",
  "marketValue": "<string>",
  "netBuyingPower": "<string>",
  "stockBuyingPower": "<string>",
  "optionBuyingPower": "<string>",
  "dayTradeBuyingPower": "<string>",
  "dayTradeOvernightRegTBuyingPower": "<string>",
  "totalEquity": "<string>",
  "realizedPl": "<string>",
  "unrealizedPl": "<string>",
  "sma": "<string>",
  "pdt": "<string>",
  "settledFunds": "<string>",
  "unsettledFunds": "<string>",
  "grossMargin": "<string>",
  "creditMultiplier": "<string>",
  "pendingOrdersCount": 123,
  "pendingOrdersMarginRequirements": "<string>",
  "heldBackFunds": "<string>",
  "smaCreditRemaining": "<string>",
  "pdtCreditRemaining": "<string>",
  "startOfDayCash": "<string>",
  "valueBought": "<string>",
  "valueSold": "<string>"
}