What is it: Python script for fetching number of unread emails from gmail

1. Follow instructions at here for gmail credentials
2. Generate credentials.json
3. Run python3 app.py on Terminal
4. Console will show number of unread messages

• If ModuleNotFoundError: No module named 'googleapiclient.discovery'

pip3 install --upgrade google-api-python-client google-auth-httplib2 google-auth-oauthlib --user