curl --request GET \
  --url https://testnet.derivadex.io/stats/api/v1/trader

{
  "value": {
    "trader": "<string>",
    "availDdx": "<string>",
    "lockedDdx": "<string>",
    "payFeesInDdx": true
  },
  "success": true,
  "timestamp": 123
}