hello iam using bittrex and iam thinking to use API key so i can runing my account from defrent platform .

what the best plat for that i can depost and withdrow from my bittrex with it ?? i mean iam trying to use coinigy to get out my btc i'ts not working and i used my key right i made marks on witdraw and trading everything is fine BUT i dont know why its not working anyone have any idea .. thanks