I opened a new account for WPcentral.. and I need to logging to wpcentral app using new account.. how cani logging out from old account.. there is no option available in the app for log out ?
Just use the forum sea... well, I'm not allowed to write that ;-)
On the main news page of the app, click the settings button to the top right (the little gearwheel). Then swipe to "content". There you can click "Delete Forum account settings".