Who has developed authentication with Passport for Gatsby?

I'm looking for any Gatsby.js enthusiasts who have worked out connecting various strategies with Passport.js to Gatsby.

I'm using gatsby-plugin-express and proxying my authentication API (because I also serve some data to the front end). But, the front end gets hung up on the redirect, like for passport-google-oauth20. Has anyone else encountered this issue and would like to work together on a solution?