如何覆盖before_request中登录路由api调用的jwt_required函数调用

from flask import Flask, jsonify, request
from flask_jwt_extended import JWTManager, jwt_required

app = Flask(__name__)
app.config['JWT_SECRET_KEY'] = 'your-secret-key'  # 设置JWT的密钥，用于签名
jwt = JWTManager(app)

# 模拟用户登录，生成JWT令牌
@app.route('/login', methods=['POST'])
def login():
    # 在实际应用中，这里应该是验证用户名和密码的逻辑
    username = request.json.get('username')
    password = request.json.get('password')

    # 验证通过，生成JWT令牌
    access_token = jwt.create_access_token(identity=username)
    return jsonify(access_token=access_token)

# 需要登录才能访问的路由API
@app.route('/protected', methods=['GET'])
@jwt_required
def protected():
    current_user = jwt.get_jwt_identity()
    return jsonify(logged_in_as=current_user), 200

# 在before_request中调用jwt_required函数
@app.before_request
def before_request():
    if request.endpoint == 'protected':
        jwt_required()(lambda: None)()

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