This is great for prototypes but there's an edge case that breaks it's usefulness in live sites.
Sometimes google will make already logged in users reauthenticate. It will redirect to the authentication page and you'll get a bunch of HTML rather than json returned, and the user won't know why it's not working.
Sometimes google will make already logged in users reauthenticate. It will redirect to the authentication page and you'll get a bunch of HTML rather than json returned, and the user won't know why it's not working.