How To Fix "missing Or Insufficient Permissions At Http2callstream"

I'm trying to update firestore document from cloud function using nodejs, but getting error error Logs : Error: Missing or insufficient permissions. at Http2CallStream.call.on (/sr

Solution 1:

The problem was solved this way:

1. Download the secret key from the firebase console.

2. Save the downloaded .json file in the path "./your project path/functions".

3. Add this code to the top of your index.js:

   var serviceAccount = require("./[downloaded file name].json");
   
   admin.initializeApp({
       credential: admin.credential.cert(serviceAccount),
       databaseURL: "https://[your project id].firebaseio.com"
   });
   

4. Deploy the function.