text: from flask import Flask
  from flask_sqlalchemy import SQLAlchemy
  
  app = Flask(__name__)
  app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///database.sqlite'
  db = SQLAlchemy(app)
  
  
  class User(db.Model):
      id = db.Column(db.Integer, primary_key=True)
      email = db.Column(db.String(100), unique=True)
      password = db.Column(db.String(32))
  
      def __init__(self, email, password):
          self.email = email
          self.password = password
  
      def __repr__(self):
          return '<User {email}>'.format(email=self.email)
  
  
  class Note(db.Model):
      id = db.Column(db.Integer, primary_key=True)
      title = db.Column(db.String(100), unique=True)
      text = db.Column(db.Text())
      user_id = db.Column(db.Integer)
  
      def __init__(self, title, text, user_id):
          self.title = title
          self.text = text
          self.user_id = user_id
  
      def __repr__(self):
          return '<Note {title}>'.format(title=self.title)
  