title: Instagram API iOS client possible to logout of Instagram
body: <p>I have an app where user logs into Instagram through implicit auth with Oauth 2. Is there any way for user to log out or to relogin as different user? </p>
  
  <p>As it is now, when I call the auth URL after user logs in, Safari browser is launched, then goes back to the app without displaying login fields. I need Safari to display login fields and allow user to enter uname and pass before control is passed back to app. </p>