### Operating System Linux ### Programming Language Python ### CCXT Version v4.5.8 ### Description I have USDT on my Phemex futures account but fetch_balance() always returns 0. ``` import ccxt exchange = ccxt.phemex({ 'apiKey': '', 'secret': '', 'options': { 'defaultType': 'swap', }, }) balances = exchange.fetch_balance() print(balances["total"]) ``` Returns: {'USDT': 0.0}