Can’t upgrade connection without logging out

The new version introduces a notice asking us to update our integration to use OAuth authentication rather than API keys, and to do so by clicking the Login button on the Settings page.

However, I’m already logged in, so I just see a log out button. I’m assuming I still need to upgrade to OAuth authentication, but I don’t want to log out and potentially lose our existing settings. I’d love a way to upgrade our authentication method without logging out first. I doubt logging out is a “safe” option if we want to keep existing settings.