@app.before_first_request
def create_tables():
    db.create_all()

class UserModel(db.Model):
    __tablename__ = 'users'

    id = db.Column(db.Integer, primary_key = True)
    username = db.Column(db.String(80))
    password = db.Column(db.String(80))

    def __init__(self, username, password):
        self.username = username
        self.password = password

admin = self('admin', 'test')
    guest = self('guest', 'test')