<h1 style="font-family: 'Malgun Gothic';">req#logout requires a callback function</h1>
<h2 style="font-family: 'Malgun Gothic';">&nbsp;</h2>
<pre>Error: req#logout requires a callback function</pre>
<p>혹시 코드가 잘못되었나 살펴봐도 아무런 이상이 없습니다.</p>
<div style="color: #d4d4d4; background-color: #1e1e1e; font-family: Consolas, 'Courier New', monospace; font-size: 14px; line-height: 19px; white-space: pre;">
<div><span style="color: #4fc1ff;">router</span>.<span style="color: #dcdcaa;">get</span>(<span style="color: #ce9178;">'/logout'</span>, <span style="color: #9cdcfe;">isLoggedIn</span>, (<span style="color: #9cdcfe;">req</span>, <span style="color: #9cdcfe;">res</span>) <span style="color: #569cd6;">=&gt;</span> {</div>
<div>&nbsp; &nbsp; <span style="color: #9cdcfe;">req</span>.<span style="color: #dcdcaa;">logout</span>(); <span style="color: #6a9955;">// req.user 객체를 제거</span></div>
<div>&nbsp; &nbsp; <span style="color: #9cdcfe;">req</span>.<span style="color: #9cdcfe;">session</span>.<span style="color: #dcdcaa;">destroy</span>(); <span style="color: #6a9955;">// req.session 객체의 내용을 제거</span></div>
<div>&nbsp; &nbsp; <span style="color: #9cdcfe;">res</span>.<span style="color: #dcdcaa;">redirect</span>(<span style="color: #ce9178;">'/'</span>); <span style="color: #6a9955;">// 초기화면으로 리다이렉트</span></div>
<div>});</div>
</div>
<p>콜백함수가 필요하다는데 어떻게 해야하나요</p>

<p>npm i passport@0.5 하세요. 0.6에서 코드가 바뀌었습니다.</p>

<pre><code class="language-javascript">router.get('/logout', isLoggedIn, (req, res) =&gt; {
  req.logout((err) =&gt; {
    if (err) { return next(err); }
    req.session.destroy();
    res.redirect('/');
  });
});</code></pre>

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req#logout requires a callback function