You’re sending out a website to collect data, most likely for an entrepreneurial school project.

Instead of using extremely complicated authentication methods, just have your users write their email at the top of the form. No authentication required.

They won’t mistype their email (usually), and you can skip the extra page of signing in with Google or creating a password. That redirect is going to be a huge hit on your impressions.

Trust your users to type their email correctly, and you won’t need a password.