如何在登录成功后才将用户重定向到所需的html页面(Flask Python App)？

from flask import Flask, render_template, request, redirect, url_for, session

app = Flask(__name__)
app.secret_key = 'your_secret_key'  # 设置session的密钥

@app.route('/')
def index():
    return render_template('login.html')

@app.route('/login', methods=['POST'])
def login():
    username = request.form['username']
    password = request.form['password']
    
    # 在这里进行用户名和密码的验证逻辑
    
    # 假设验证成功
    session['logged_in'] = True
    return redirect(url_for('dashboard'))

@app.route('/dashboard')
def dashboard():
    if not session.get('logged_in'):
        return redirect(url_for('index'))
    return render_template('dashboard.html')

@app.route('/logout')
def logout():
    session['logged_in'] = False
    return redirect(url_for('index'))

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