To interact with Google drive you need to download client_secret.json file and add it to src folder. To generate client_secret.json file follow the steps below:
#Use "https://console.developers.google.com/start/api?id=drive" to create or select a project in the Google Developers Console and automatically turn on the API. Click Continue, then Go to credentials. #On the Add credentials to your project page, click the Cancel button. #At the top of the page, select the OAuth consent screen tab. Select an Email address, enter a Product name if not already set, and click the Save button. #Select the Credentials tab, click the Create credentials button and select OAuth client ID. #Select the application type Other, enter the name "ISOTracker", and click the Create button. #Click OK to dismiss the resulting dialog. #Click the file_download (Download JSON) button to the right of the client ID. #Move this file to your working directory and rename it client_secret.json.
You also need to create database named as "isotracker".