curl --location --request GET 'https://sandbox-gateway.pingpongx.com/v2/fx/trade/credit/balance/fw' \
--header 'access_token;'
{
"code": 0,
"data": {
"credit_available": 50000.11,
"credit_limit": 50000.11,
"credit_occupy": 0
},
"message": "ok"
}