Is it possible to change my login method?

I currently log in with Patreon, as it was the only available log in method some time ago.  Patreon is not the most reliable, it takes a bit longer to log in and I frequently get these:

Sometimes, the page keeps loading indefinitely.  I'd much rather switch to google, but I'm not sure if that's possible.  This isn't much of an inconvenience, but I'm mentioning it nonetheless.