We're using Netlify's GoTrue (https://github.com/netlify/gotrue https://github.com/netlify/gotrue) for logins. For the providers they already support (bitbucket

We're using Netlify's GoTrue (https://github.com/netlify/gotrue https://github.com/netlify/gotrue) for logins. For the providers they already support (bitbucket, github, gitlab, and google) we are aiming to release this month. For other logins, we will contribute back to the repo wherever there is demand.