def login(cls, name, pw):
u = cls.by_name(name)
return Hashers.check_pw_hash( name, pw, u.password) and u
def register(cls, name, pw, email = None):
pw_hash = Hashers.make_pw_hash(name, pw)
u = User( username = name, password = pw_hash)
if email:
u.email = email
return u
