You can now create a 100% Webflow “Sign in with Google” button and actually tie it into Google Authentication 
We have a nice video tutorial that can walk you through the entire setup process. https://docs.memberstack.com/hc/en-us/articles/8327236548379-Google-Authentication You’ll need a free Memberstack account to get it working, but the button is 100% designed in Webflow.
It took me about 20 minutes from start to finish (and then I had to wait a few days for Google to actually approve my account).
Keywords
Google, Google login, Google auth, Continue with Google, social login, social auth, so, Webflow memberships.