Where is or What is the serviceAccountKey.json is the node js sample of firebase realtime database

Question

I have downloaded the zip of Firebase real-time database node.js sample and navigate to the database section

https://github.com/firebase/quickstart-node

Answer 1

How to download your serviceAccountKey.json file
1. Open Your firebase project
2. On the navigation drawer, select the project overview
3. Then select "Project settings"
4. On the new page, Select Service Accounts
5. Download file and store in a secured place.

Note: Do not commit this file to git or share with authorized users.