How I tested Row Level Security before shipping a SaaS starter kit (so one user can't see another's data)

When you're building a multi-tenant app, there's one bug category that's worse than any other: a user seeing someone else's data. Not a crash, not a broken button — a genuine privacy failure. I recently built a Next.js + Supabase + Stripe starter kit, and before I'd call the database layer "done," I wanted to actually prove the security held, not... Weiterlesen