Update file (controllers.py): Update methods and controllers to use and test wtforms.
Update method (forms.py): Replace returned value from models.session to self.session. The session variable is now not available on models module.
Update file (models.py): Move sqlalchemy related code that processes the engine and session. The file should only contain the class and attributes to be processed by sqlalchemy.
Add new methods (manager.py): "database()". The sqlalchemy-related code is placed here. This method will handle both the engine and orm session.
Update file (index.html): Modify to reflect current updates of forms.py.