I have made a basic app using Twitter\'s fabric that allows user to tweet within my app and Provide Login With Twitter.Every things works a I Wanted.
UPDATE: May 2016 - Framework has changed so this answer is no longer relevant.
See this answer: https://stackoverflow.com/a/35765833/940709 and this answer: https://stackoverflow.com/a/30916904/940709 instead.
[[[Twitter sharedInstance] sessionStore] logOutUserID:USERID];