How to use passport to authenticate users and admins

Im running a local strategy in passport and I have had an issue where it seems to authenticate users fine and I can have that user persisted across the site in a session, but not admins. I have the user and admin account under separate collections in MongoDB.I have tried plenty of different routes like having different passports for admin and user and having different databases for admin and users to no avail. I have come to a stand still. I would appreciate an advice!

//Passport.js
const LocalStrategy = require('passport-local').Strategy;
const mongoose = require('mongoose')
const bcrypt = require('bcrypt')


// Loads in user model
const User = require('../models/userModel')
//Loads in the admin model
const Admin = require('../models/adminModel')


module.exports = function (authUser){
  authUser.use(
    'authUser',new LocalStrategy({usernameField: 'username'}, (username, password, done)=>{
      //Match user
      const user = User.findOne({username: username})
      .then(user=>{
        if(!user){
          return done(null, false, {message: 'Incorrect Username'})
        }
        //Match password
        bcrypt.compare(password, user.password, (err, isMatch)=>{
          if(err) throw err;
          if (isMatch) {
            return done(null, user)
          }else {
            return done(null, false, {message: 'Incorrect password'})
          }
        })
      })
      .catch(err=>console.log(err));
    })
  )

  authUser.serializeUser((user, done) =>{
    done(null, user.id);
  });

  authUser.deserializeUser((id, done) =>{
    User.findById(id, (err, user) => {
      done(err, user);
    });
  });

  authUser.use(
    'admin',new LocalStrategy({usernameField: 'username'}, (username, password, done)=>{
      //Match user
      const admin = Admin.findOne({username: username})
      .then(admin=>{
        if(!admin){
          return done(null, false, {message: 'Incorrect Username'})
        }
        //Match password
        bcrypt.compare(password, admin.password, (err, isMatch)=>{
          if(err) throw err;
          if (isMatch) {
            return done(null, admin)
          }else {
            return done(null, false, {message: 'Incorrect password'})
          }
        })
      })
      .catch(err=>console.log(err));
    })
  )

  authUser.serializeUser((admin, done) =>{
    done(null, admin.id);
  });

  authUser.deserializeUser((id, done) =>{
    Admin.findById(id, (err, admin) => {
      done(err, admin);
    });
  });
}

//Authenticate.js
module.exports = {
  checkAuthenticated: function(req, res, next) {
    if (req.isAuthenticated()) {
      return next()
    }
    // req.flash('error_msg', 'please login to view this resource')
    res.redirect('/Users/Login')
  },
  checkNotAuthenticated: function(req, res, next) {
    if (req.isAuthenticated()) {
      return res.redirect('/')
    }
    // req.flash('error_msg', 'please login to view this resource')
    return next()
  },
  checkAdminAuthenticated: function(req, res, next) {
    if (req.isAuthenticated()) {
      return next()
    }
    // req.flash('error_msg', 'please login to view this resource')
    res.redirect('http://localhost:3000/Admin/SignIn')
  }
}

//Snippet from adminRoute.js
const passport = require('passport')
require('../config/passport.js')(passport)

app.get("/SignIn", checkNotAuthenticated,(req,res) =>{
  res.render("adminLogin.ejs")
})
app.get('/Orders', checkAdminAuthenticated, (req, res) => {
  Request.find({}).then(results => {
    res.render('orders.ejs', {
      Orders: results
    });
  })
})
// Login Handle
app.post('/SignIn', checkNotAuthenticated, (req,res, next)=>{
  passport.authenticate('admin',{
    successRedirect: '/AdminPage', //On success redirect to home
    failureRedirect: '/Admin/SignIn', //On failure redirect back to login page
    session: true,
    failureFlash: true
  })(req,res,next);
})
module.exports = app

//Snippet from userRoute.js
const passport = require('passport')
const authUser = new passport.Passport();
require('../config/passport.js')(authUser)
// DB config
const userDB = require('../config/keys').MongoURI
const User = require('../models/userModel')
app.get("/Login", checkNotAuthenticated,(req,res) =>{
  res.render("login.ejs")
})

app.delete('/logout', (req, res) => {
  req.logOut()
  res.redirect('/Users/Login')
})

app.get('/Register', checkNotAuthenticated,  (req,res)=>{
  res.render("register.ejs")
})

// Login Handle
app.post('/Login', checkNotAuthenticated,(req,res, next)=>{
  authUser.authenticate('authUser',{
    successRedirect: '/', //On success redirect to home
    failureRedirect: '/Users/Login', //On failure redirect back to login page
    session: true,
    failureFlash:true
  })(req,res,next);
})
module.exports = app

// snippet from app.js
const passport = require('passport')
const authUser = new passport.Passport();
require('./config/passport.js')(authUser)
    app.use(authUser.initialize())
    app.use(authUser.session())
    app.use('/Users', require('./routes/userRoute'))
    app.use('/Admin', require('./routes/adminRoute'))