The first thing to do to get started with Octauthent is to setup Cloudflare on your site. This is a step-by-step tutorial to help you in this task.

Once all your traffic is going through Cloudflare's network, you're just one step away from having password-protected pages on your site. Follow this tutorial to get started with Octauthent

If your site is deployed on Vercel, this is the tutorial you need!