How to set a match path in security rules

Question

I am trying to learn how to use security rules but it is not working I actually wrote two rules

rules_version = '2';
service cloud.firestore {
  match /databases/{database}/documents {
    match /{document=**} {
      allow read: if request.auth != null;
    }
    match /users/{user} {
      allow create: if request.auth != null;
    }
  }
}

First one is working perfectly but the second one is not although I have a collection called users

Answer 1

You're trying to write to the path documents/users in the database, which creates a document called users in the documents collection. Your security rules only allow writing to the users collection, so more like you'll want to write to users/myuid in the playground.