title: Firebase email saying my realtime database has insecure rules
body: <p>I recently received an email from firebase telling me that my realtime database has insecure rules. These are the rules that I have set:</p>
  
  <pre><code>{
    "rules": {
      ".read": "auth != null",
      ".write": "auth != null"
   }
  }
  </code></pre>
  
  <p>Is this not a secure rule?</p>
  
  <p>Email/Password is the only sign-in method that I have enabled.</p>