How to Build Secure SSR Authentication with Supabase, Astro, and Cloudflare Turnstile

Jun 20, 2025 · 13 min read · In this guide, you'll build a full server-side rendered (SSR) authentication system using Astro, Supabase, and Cloudflare Turnstile to protect against bots. By the end, you'll have a fully functional authentication system with Astro actions, magic li...