Account liquidity represents the USD value with the specific asset/amount-continue-redeeming or amount-continue-borrowing before it reaches liquidation. Returns Tuple of values (equity, shortfall, collaterals, borrows). A non-zero equity value indicates the account has available borrowable value, a non-zero shortfall value indicates the account is currently below the collateral requirement and is subject to liquidation. At most one of equity or shortfall shall be non-zero. Collaterals and borrows represent the current collateral and borrow value is USD with 36 integer precision which for example, 360000000000000000000000000000000000000000 indicates 360000 in USD.