give up using torndb instead of sqlachemy
pep8 style
pep8 style
add models: User, Guarantee, Loan, Behaviour
rename models.py to db.py
models.py CURD
add a primary key to table guarantee
exchange dict to single variable
i dont know what happened
add add_user(), delete_user(), update_user(), update_user_password(), update_user_avatar()
i dont what happended