Flask-Login
Flask-Login provides user session management for Flask. It handles the common tasks of logging in, logging out, and remembering your users' sessions over extended periods of time.
Flask-Login is not bound to any particular database system or permissions model. The only requirement is that your user objects implement a few methods, and that you provide a callback to the extension capable of loading users from their ID.
Installation
Install the extension with one of the following commands:
$ easy_install flask-login
or alternatively if you have pip installed:
$ pip install flask-login