How to Solve NameError: name 'InstalledAppFlow' is not defined -- google_auth_oauthlib

Solution: Import the 'InstalledAppFlow' module

To Solve the error, add the following line to the top of your code.

from google_auth_oauthlib.flow import InstalledAppFlow

For more information:
Python google_auth_oauthlib InstalledAppFlow