Could not load the default credentials? (Node.js Google Compute Engine tutorial)

Question

SITUATION:

I follow this tutorial: https://cloud.google.com/nodejs/tutorials/bookshelf-on-compute-engine

Everything works fine until I do

Answer 1

I also had this error problem, here I had not created the object of

keyFilename (stores the credentials of the api)

in the sessionClient object for nodejs app.

const sessionClient = new dialogflow.SessionsClient({
                keyFilename: "./keyCredentials.json"  
       });
        
           const sessionPath = sessionClient.sessionPath(projectId, sessionId);

To download 'keyCredentials.json' goto:

https://console.cloud.google.com/apis/credentials/serviceaccountkey

Also add the path of this file to the system variables

1. In windows open powershell
2. type GOOGLE_APPLICATION_CREDENTIALS = [PATH_TO_SERVICE_ACCOUNT_JSON_FILE]