Where to put AUTH in Next.js 16?

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Where should you put Authentication in Next.js 16? Proxy or DAL? 🍃 Next.js Weekly Newsletter: https://tobimey.dev/nextjsweekly want to sponsor me? ➡️ https://sponsor.tobimey.dev/ 👀 also find me here: github: https://github.com/tobimey my website: https://tobimey.dev x: https://x.com/tobimey 📹 my screen recorder & editor: https://www.tella.com 0:00 The Problem of Authentication 1:54 Optimistic Proxy Auth 2:44 How to make it secure 4:16 The Data Access Layer 6:28 How to make it fast #nextjs #react19