title: How to remove save username and password in composer (laravel 4)
body: <p>I have updated my laravel vendor using composer. I have bought a package which is located in a github private repo. On downloading composer ask username and password, I have entered the wrong password so it gives me an error. After that I run composer update again but this time it just keep the old wrong password it did not ask me to enter the password again, somewhat save in composer cache. How could I remove the old password in composer?</p>