Supabase issue - please help asap

I’m currently debugging an issue with my Supabase setup that’s affecting authentication and data flow in my application. The problem has forced me to dig deeper into how Supabase handles keys, permissions, and real-time connections. While frustrating, it’s been a valuable learning experience in understanding how modern backends actually work under the hood. Resolving this is helping me become much stronger at diagnosing and fixing production-level problems.