如何在flask python中为不同用户显示不同的todo-list数据

from flask import Flask, render_template
from flask_sqlalchemy import SQLAlchemy
from flask_login import LoginManager, UserMixin, login_required, current_user

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'your_database_url_here'
app.config['SECRET_KEY'] = 'your_secret_key_here'
db = SQLAlchemy(app)
login_manager = LoginManager(app)

# 定义用户模型
class User(UserMixin, db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(20), unique=True)
    password = db.Column(db.String(80))
    todos = db.relationship('Todo', backref='user', lazy='dynamic')

# 定义todo-list模型
class Todo(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(100))
    user_id = db.Column(db.Integer, db.ForeignKey('user.id'))

@login_manager.user_loader
def load_user(user_id):
    return User.query.get(int(user_id))

@app.route('/todos')
@login_required
def todos():
    user = current_user
    todos = user.todos.all()
    return render_template('todos.html', todos=todos)

if __name__ == '__main__':
    app.run()