I am using Google OAuth integration and its working quite well with Universal Login Page.
However, in my React app I have setup a custom signup form and then create the users via Management API. How can I add the “Continue with Google” button to my custom signup form so it works in the same way it does on the Universal Login Page?
You would need your button to call /authorize with the connection=google-oauth2 querystring parameter in place, this would skip rendering the Universal Login page.