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FB issue: Re-prompt for permission for a logged in authenticated user

consent
facebook

#1

The scenario is I have a bunch of existing users using a mobile app logging in via Facebook. I use refresh tokens so they do not need to login in each time they use the app. Recently I have extended the functionality of the app to include a feature that uses facebook friends.

How do I re-prompt for consent for existing logged in users with out have to log them out and call authorize with prompt=consent as this brings up the login screen.

Also the permission is optional ideally they can log in denying friend list access, but when they come to use the feature I could have a request friends list button (if the app didn’t already have access) that would bring up the facebook consent form without the user having to the login form.

Thanks

Marc