I’m ready to roll out a completely free membership system that works seamlessly on my existing website and on companion mobile apps. The goal is to give users a single account they can create once, then use everywhere—no paywalls, no hidden tiers—just straightforward access. Here’s what I need help with: • A secure sign-up / log-in flow that syncs data between the web front-end and both iOS and Android builds. • A lightweight user-management dashboard on the back-end so I can view, suspend, or delete accounts without touching the database directly. • API endpoints (or GraphQL schema, if you prefer) that the site and the apps can call for authentication, password reset, profile updates, and basic analytics hooks. • Clean code and clear documentation so my in-house dev can maintain it once you’re done. I haven’t locked myself into a particular membership architecture—subscription, tiered levels, or pure one-time access—because at this stage I want expert guidance on what makes most sense for long-term growth while keeping the sign-up free. Feel free to propose the structure you think fits. If your solution uses Firebase Auth, AWS Cognito, or another battle-tested auth service, just outline why it’s the best choice. Security, scalability and a smooth UX are non-negotiable. Deliverables will be: 1. Fully functional membership module integrated into the live website. 2. Mobile app components (iOS & Android) wired to the same back-end. 3. Admin dashboard and deployment scripts. 4. Setup/hand-off documentation and a brief walkthrough video. I’ll test by creating accounts on web and mobile, checking seamless login, and verifying data consistency. Let me know your preferred stack, an estimated timeline, and any similar projects you’ve shipped.