Flask-2fa is a demo application for two factor authentication using flask and pyotp library.

$ cd flask-2fa
$ python3 -m venv .
$ source bin/active
$ pip install -r src/requirements.txt
$ python src/app.py

Open the app in the browser using http:https://localhost:5000

• Run the app using above steps
• Browse the app
• Create account
• Login into the app
• Scan the QR code shown on the home page using Google Authenticator or Authy APP and save the 2FA settings
• Enable the 2FA on the account in the app
• Logout
• Try logging in again
• This time it will ask for code in addition to user and password login
• Using the Google Authenticator or Authy get the code and use it
• You should be logged in successfully

Note: This is not production ready app. If you see any errors, use private or incognito window (to start clean session without cookies).