Authenticating users in Astro using Neon Postgres and Lucia Auth

The guide offers a comprehensive walkthrough for implementing user authentication in an Astro application using Lucia Auth and a serverless Postgres database powered by Neon. It details the necessary prerequisites, including Node.js, Neon, and Vercel accounts, and outlines the step-by-step process of setting up the database, configuring the Astro application, and integrating Tailwind CSS for styling. The guide further explains how to enable server-side rendering with Vercel, establish a secure Postgres database connection, and set up user authentication routes using Lucia Auth. Additionally, it covers the creation of HTML pages for user sign-up and sign-in, along with API routes to handle authentication logic. The document concludes with instructions for deploying the application to Vercel and highlights the importance of creating protected routes accessible only to authenticated users, emphasizing the security and scalability benefits of this setup.