How to only allow one admin user to write Firebase Database?

Question

I am trying to set up a Firebase database that only I can write. So no user will have permission to write anything. But everyone will be able to read it.

However, I

Answer 1

This should work:

{
  "rules": {
    ".read": true,
    ".write": "auth.uid === 'dJrGShfgfd2'"
  }
}

Everyone in the world will be able to read the data, but only the user with UID dJrGShfgfd2 (and processes with administrative access) can write the data.