That's just plain retarded, read up on how API keys work.
yes I know that, I know that very well - hence me asking your twat of a mate to do it - as its fucking impossible, yet he states repeatedly that an API key is the same as a bitcoin private key you fucking useless toiletbrush twat
EDIT
just to spoon feed it to you, as I see you struggle to get the full story before commenting like a cuntsmouth
an API KEY, based on its privileges, can act as a private key