Let me put the question differently: Why do you want to use the trading API as opposed to simply using the CEX.IO website to place an order?
I want to make it like bot trading set the orders automatically
The only somewhat trusthworthy trading bot I'm aware of is Gekko, but it doesn't support CEX.IO trading, only market data fetching:
https://gekko.wizb.it/docs/introduction/supported_exchanges.htmlMaybe you find a CEX.IO specific trading bot somewhere on these boards, but I'm not sure if there are any trustworthy ones available.
Other than that your only option is to write a trading bot yourself, but to start with that you'd first need to learn how to write software.