아.. 혹시해서
const passport = require('passport');
const LocalStrategy = require('passport-local').Strategy;
const session = require('express-session');
app.use(session({ secret: '비밀코드', resave: true, saveUninitialized: false }));
app.use(passport.initialize());
app.use(passport.session());
밑으로 라우트를 내리니까 되네요 ㅎㅎ