I Built 6 Authentication Methods for My Laravel SaaS - Here's the Full Architecture

Every SaaS project starts with authentication. And every time, developers face the same choice: use a starter kit and outgrow it in a month, or build from scratch and spend weeks on something that isn't your core product. I've been building Kohana.io - a SaaS CRM/ERP for small businesses - and I got tired of this cycle. So I built a comprehensive authentication module that handles everything from basic email login to QR code authentication and real-time admin security alerts. Now I'm extracting it into LaraFoundry - an open-source SaaS framework for Laravel - so nobody has to build this again. Here's how it all works. The Authentication Stack Method Use Case Email/Password Standard login with rate limiting OAuth (Google, Facebook, Twitter) One-click social login QR Code Cross-device login (scan from phone) PIN Code Session lock for shared workstations 2FA (TOTP) Admin account protection IP Whitelisting Admin access restriction Tech stack: Laravel 12, Inertia.js v2, Vue 3, Custom SCSS K