券商 API資産 取得帳戶餘額取得帳戶餘額 GET /broker/assets/balances/get 擷取帳戶資產資訊,包括現金餘額、持倉市值、損益、購買力、應付利息等。 Request Responses200401417500OKUnauthorized: Authentication requiredA business logic error triggered when the request cannot be processed due to domain-specific constraints.Internal Server Error.