Tutorial says select Realtime Database and then select Rules, but no database exists

I think the tutorial is probably missing an instruction to create a database?
On this page: https://firebase.google.com/codelabs/firebase-ios-swift#4
It says "From within the Database section of Firebase console select Realtime Database, then click on the Rules tab" but I didn't have a Rules tab, just a big Create database button. I had to create database before I could access rules.