I created a plugin to log in to Omeka Classic with a Google account instead of Omeka username/password credentials.
It seems to work just fine for me, but I worry that it might be hack-y, so if anyone wants to review and comment, and help improve, please do! And while I use git for version control, I have no experience doing it in a collaborative way, so it would be wonderful if anyone worked with me on the plugin in that way.