오류가 납니다.ㅜㅜ

TypeError: C:\Program Files\pjt\visualcode_workspace\nodebird\views\main.pug:23
    21|       for twit in twits

    22|         .twit

  > 23|           input.twit-user-id(type='hidden' value=twit.user.id)

    24|           input.twit-id(type='hidden' value=twit.id)

    25|           .twit-author= twit.user.nick

    26|           -const follow = user && user.Followings.map(f => f.id).includes(twit.user.id);


Cannot read property 'id' of undefined
    at eval (eval at wrap (C:\Program Files\pjt\visualcode_workspace\nodebird\node_modules\pug-runtime\wrap.js:6:10), <anonymous>:166:113)
    at eval (eval at wrap (C:\Program Files\pjt\visualcode_workspace\nodebird\node_modules\pug-runtime\wrap.js:6:10), <anonymous>:293:4)
    at template (eval at wrap (C:\Program Files\pjt\visualcode_workspace\nodebird\node_modules\pug-runtime\wrap.js:6:10), <anonymous>:799:121)
    at Object.exports.renderFile (C:\Program Files\pjt\visualcode_workspace\nodebird\node_modules\pug\lib\index.js:427:38)
    at Object.exports.renderFile (C:\Program Files\pjt\visualcode_workspace\nodebird\node_modules\pug\lib\index.js:417:21)
    at View.exports.__express [as engine] (C:\Program Files\pjt\visualcode_workspace\nodebird\node_modules\pug\lib\index.js:464:11)
    at View.render (C:\Program Files\pjt\visualcode_workspace\nodebird\node_modules\express\lib\view.js:135:8)
    at tryRender (C:\Program Files\pjt\visualcode_workspace\nodebird\node_modules\express\lib\application.js:640:10)
    at Function.render (C:\Program Files\pjt\visualcode_workspace\nodebird\node_modules\express\lib\application.js:592:3)
    at ServerResponse.render (C:\Program Files\pjt\visualcode_workspace\nodebird\node_modules\express\lib\response.js:1012:7)
    at Post.findAll.then (C:\Program Files\pjt\visualcode_workspace\nodebird\routes\page.js:33:13)
    at tryCatcher (C:\Program Files\pjt\visualcode_workspace\nodebird\node_modules\bluebird\js\release\util.js:16:23)
    at Promise._settlePromiseFromHandler (C:\Program Files\pjt\visualcode_workspace\nodebird\node_modules\bluebird\js\release\promise.js:517:31)
    at Promise._settlePromise (C:\Program Files\pjt\visualcode_workspace\nodebird\node_modules\bluebird\js\release\promise.js:574:18)
    at Promise._settlePromise0 (C:\Program Files\pjt\visualcode_workspace\nodebird\node_modules\bluebird\js\release\promise.js:619:10)
    at Promise._settlePromises (C:\Program Files\pjt\visualcode_workspace\nodebird\node_modules\bluebird\js\release\promise.js:699:18)
    at _drainQueueStep (C:\Program Files\pjt\visualcode_workspace\nodebird\node_modules\bluebird\js\release\async.js:138:12)
    at _drainQueue (C:\Program Files\pjt\visualcode_workspace\nodebird\node_modules\bluebird\js\release\async.js:131:9)
    at Async._drainQueues (C:\Program Files\pjt\visualcode_workspace\nodebird\node_modules\bluebird\js\release\async.js:147:5)
    at Immediate.Async.drainQueues (C:\Program Files\pjt\visualcode_workspace\nodebird\node_modules\bluebird\js\release\async.js:17:14)
    at runCallback (timers.js:705:18)
    at tryOnImmediate (timers.js:676:5)


왜 이런 오류가 나오는지 잘 모르겠습니다.

어떻게 수정하고 대체 뭘 잘못한거죠 ㅠ