How to clear SFSafariViewController credentials?

Question

I\'m using SFSafariViewController in Swift 2 to display web pages on an iPad Air 2 with ios 9.1 (13B143). Each of the web pages requires credentials from the user. However

Answer 1

So I opened an Apple 'Technical Support Incident' on this. The following is summary of their answer: SFSafariViewController runs outside of my App's process and in order to be secure my App can not modify SFSafariViewController's state. In other words, my App can not clear credentials stored by SFSafariViewController.