I’m the only user at the moment “admin”, there is no login page or register an account.
do I have to create user registration to fix permissions error?
what is the best prompt to build a user registration and login that can solve this issue for good?
Hey @Bmuzammil 
welcome to the community!
That “Missing or insufficient permissions” error usually means your Firestore security rules are blocking writes from unauthenticated users. You don’t have to create a registration system, but adding Firebase Authentication (email/password, Google Sign-In, etc.) is the most secure and scalable fix — it helps manage access properly and prevents unauthorized writes.
I actually specialize in setting up Firebase Auth + Firestore integrations — including login, registration, and secure rule configurations. If you’d like, I can help you implement the full setup so it works smoothly and securely.
You can reach me here , starblackmedia@gmail.com or on WhatsApp at +2348089616358 to go over your project details.
— Sunny
Firebase Studio & Full-Stack Developer