Configuring the Realtime Database

In the previous sections, we successfully configured authentication. Now, it's time to get the database ready. We need some storage for the group chat information and messages. Let's get started:

1. Navigate to the Firebase console and click on the Database link in the project sidebar. By default, Firebase offers two different tiers of databases: Cloud Firestore and Realtime Database. For this project, you need the Realtime Database.
2. Scroll down until you reach the Realtime Database selector:

3. Click the Create database button to launch the corresponding dialog.
4. The first thing that Firebase asks you for is the security rule preset. You can choose from the following options:

• Locked mode: This makes your database private by denying all reads and writes.
• Test mode: This allows all reads and writes access to your database.

5. We are going...