curl --request DELETE \
  --url https://trade.predexon.com/api/accounts/{accountId} \
  --header 'x-api-key: <api-key>'

{
  "error": "insufficient_balance",
  "message": "Insufficient balance: need 50.000000, have 12.500000",
  "requestId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890"
}