flask_login会自动设置"next“参数吗？

from flask import Flask, redirect, request, url_for
from flask_login import LoginManager, login_user

app = Flask(__name__)
login_manager = LoginManager(app)

@login_manager.user_loader
def load_user(user_id):
    # 通过用户ID加载用户对象
    return User.get(user_id)

@app.route('/login', methods=['GET', 'POST'])
def login():
    if request.method == 'POST':
        # 验证用户登录信息
        user = User.authenticate(request.form['username'], request.form['password'])
        if user:
            # 登录成功
            login_user(user)
            next_page = request.args.get('next')
            if not next_page or not next_page.startswith('/'):
                next_page = url_for('index')
            return redirect(next_page)
        else:
            # 登录失败
            return 'Invalid username or password'
    else:
        # 显示登录表单
        return render_template('login.html')