express根据token获取用户id「建议收藏」

//登陆时注册token
db.query(`select * from user where name=${ 
     username} and password='${ 
     password}'`, (result) => { 
   
    if (result.length == 1) { 
   
    	//jwt.sign({userId:result[0].id} 在注册的时候加入用户id
        const token = jwt.sign({ 
   userId:result[0].id}, 'buddha', { 
   
            expiresIn: 60 * 60 * 24// 授权时效24小时
        });
        jwt.verify(token, 'suiyi', function(err, decoded) { 
   
            let accessToken=decoded;
            accessToken.token=token;
            accessToken.id=result[0].id;
            accessToken.name=result[0].name;
            res.send({ 
   
                "status": "success",
                "data": [accessToken]
            });
        });
    } else { 
   
        return next(createError(400, '账号或密码错误'));
    }
})

var createError = require('http-errors');
var jwt = require('jsonwebtoken')
module.exports =(req, res, next)=>{ 
   
    // 拿取token 数据 按照自己传递方式写
    var token = req.body.token || req.query.token || req.headers['token'];

    if (token) { 
   
        // 解码 token (验证 secret 和检查有效期（exp）)
        jwt.verify(token, 'suiyi', function(err, decoded) { 
   
            if (err) { 
   
                return res.status(400).send(next(createError(400, '无效的token')));
            } else { 
   
                // 如果验证通过，在req中写入解密结果
                console.log(decoded)//{ userId: 31, iat: 1574244315, exp: 1574330715 }
                req.decoded = decoded;
                next();
            }
        });
    } else { 
   
        return res.status(403).send(next(createError(403, '没有找到token')));
    }
};

exports.collect_article = async (req, res, next) => { 
   
    
    console.log(req.decoded.userId)

}