MVP

database.rules.json

@@ -1,7 +1,12 @@
 {
-  /* Visit https://firebase.google.com/docs/database/security to learn more about security rules. */
   "rules": {
-    ".read": false,
-    ".write": false
+    ".read": "auth != null",
+    ".write": "auth != null",
+    "users": {
+      "$uid": {
+        ".read": "$uid === auth.uid",
+        ".write": "$uid === auth.uid"
+      }
+    }
   }
-}
+}