nodejs express - passport

Hello,

I am very new to nodejs but have been learning a lot these past few weeks.  I am trying to use passport to implement authentication but I am getting an error that I need to fix.  Any assistance would be much appreciated.  Here is the error I get..

Below is part of my code:

index.js

const express = require('express');
const mongoose = require('mongoose');
const hbs = require('express-handlebars');
const bodyParser = require('body-parser');
const cookieParser = require('cookie-parser')
const passport = require('passport')
const LocalStrategy = require('passport-local').Strategy
var User = require('./models/account')

mongoose.connect('mongodb:cluster0-shard-00-00-yng8g.mongodb.net:27017,cluster0-shard-00-01-yng8g.mongodb.net:27017,cluster0-shard-00-02-yng8g.mongodb.net:27017/vendorCollection?ssl=true&replicaSet=Cluster0-shard-0&authSource=admin');


app.use(cookieParser())
//Persists data in memory inside of application
app.use(require('express-session')({
    secret: 'vendorSecret',
    resave: false,
    saveUninitialized: false
}))
app.use(passport.initialize())
app.use(passport.session())

//Allows you to use static files
app.use(express.static('public'))

app.use('/vendor', vendorRouter)
app.use('/admin', adminRouter)

passport.use( new LocalStrategy(User.authenticate()) )     //<---Error on this line
passport.serializeUser(User.serialize())
passport.deserializeUser(User.deserialize())

app.listen(3000, ()=>{
  console.log("Server Listening");
})

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