express session creating new session with api call

Question

I am having an issue accessing a saved req.session object. It seems that it is accessing a new req.session with a new api call.

This is my server.js

const logger     = require('morgan');
const express    = require('express');
const bodyParser = require('body-parser');
const session    = require('express-session');
const cookieParser = require('cookie-parser');
const path       = require('path');
const apiRoute   = require('./routes/api');
const webpack    = require('webpack');
const config     = require('./webpack.config');

const app        = express();
const compiler   = webpack(config);
const port       = process.env.PORT || 3000



app.use(express.static(path.join(__dirname, 'dist')));
app.use(logger('dev'))


app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));

app.use(cookieParser("sdd", {signed: true}))
app.use(session({
 secret: 'superSecretCodez',
 resave:true,
 saveUninitialized:true,
 cookie: { maxAge: 60000 }
}))

app.use('/api', apiRoute)

app.listen(port, () => {
 console.log('Server is listening on port', port);
})

My initial api request is a get request,

router.get('/start', createGame, (req, res) => {
  res.status(200).json({response: res.game});
})

function createGame(req, res, next){
  if(req.originalUrl === '/api/start'){
    const game = new BattleShip();
    console.log(game)
    res.game = game
    req.session.game = res.game
    req.session.save(function(err){
      console.log('session saved');
      console.log("Session Before Redirect: ", req.session);
    })
  }
  next();
}

and in viewing the req.session object there, req.session.game is in the req.session.

session saved
Session Before Redirect:  Session {
  cookie: 
   { path: '/',
     _expires: 2016-10-11T03:18:40.520Z,
     originalMaxAge: 60000,
     httpOnly: true },
  game: 
   BattleShip {
     cpuBoard: [ [Object], [Object], [Object], [Object], [Object] ],
     playerBoard: [ [Object], [Object], [Object], [Object], [Object] ],
     cpuCoordinates: [],
     playerCoordinates: [],
     playerSelections: [],
     cpuSelections: [] } }
BattleShip {
  cpuBoard: 
   [ [ 'A0', 'A1', 'A2', 'A3', 'A4' ],
     [ 'B0', 'B1', 'B2', 'B3', 'B4' ],
     [ 'C0', 'C1', 'C2', 'C3', 'C4' ],
     [ 'D0', 'D1', 'D2', 'D3', 'D4' ],
     [ 'E0', 'E1', 'E2', 'E3', 'E4' ] ],
  playerBoard: 
   [ [ 'A0', 'A1', 'A2', 'A3', 'A4' ],
     [ 'B0', 'B1', 'B2', 'B3', 'B4' ],
     [ 'C0', 'C1', 'C2', 'C3', 'C4' ],
     [ 'D0', 'D1', 'D2', 'D3', 'D4' ],
     [ 'E0', 'E1', 'E2', 'E3', 'E4' ] ],
  cpuCoordinates: [],
  playerCoordinates: [],
  playerSelections: [],
  cpuSelections: [] }

The issue arises later, when I'm doing a post request and trying to access the same session to update it.

router.post('/setShips', setPlayerShips, createCpuCoordinates, (req, res) => {
  res.status(200).json({response: res.cpuCoordinates})
  // set up coordinates, players div should be updated with divs
})

function setPlayerShips(req, res, next){
  console.log(req)
  console.log(req.session)
  console.log(req.session.game)
  if(req.originalUrl=== '/api/setShips'){
      res.playerCoordinates = req.body
      req.session.game.BattleShip.playerCoordinates = res.playerCoordinates
  }
  next();
}

It seems to be accessing an entirely different cookie, which does not have req.session.game. however, there are session objects within the req object, in the session store.

 sessionStore: 
   MemoryStore {
     domain: null,
     _events: 
      { disconnect: [Function: ondisconnect],
        connect: [Function: onconnect] },
     _eventsCount: 2,
     _maxListeners: undefined,
     sessions: 
      { i2R3lJZxEneAheOciHO9QX7_dCjOyFPG: '{"cookie":{"originalMaxAge":60000,"expires":"2016-10-11T03:18:40.487Z","httpOnly":true,"path":"/"},"game":{"cpuBoard":[["A0","A1","A2","A3","A4"],["B0","B1","B2","B3","B4"],["C0","C1","C2","C3","C4"],["D0","D1","D2","D3","D4"],["E0","E1","E2","E3","E4"]],"playerBoard":[["A0","A1","A2","A3","A4"],["B0","B1","B2","B3","B4"],["C0","C1","C2","C3","C4"],["D0","D1","D2","D3","D4"],["E0","E1","E2","E3","E4"]],"cpuCoordinates":[],"playerCoordinates":[],"playerSelections":[],"cpuSelections":[]}}',
        'MLxoJNCuxn29GO-cCZyisjUwdLGhHf6l': '{"cookie":{"originalMaxAge":60000,"expires":"2016-10-11T03:18:41.083Z","httpOnly":true,"path":"/"},"game":{"cpuBoard":[["A0","A1","A2","A3","A4"],["B0","B1","B2","B3","B4"],["C0","C1","C2","C3","C4"],["D0","D1","D2","D3","D4"],["E0","E1","E2","E3","E4"]],"playerBoard":[["A0","A1","A2","A3","A4"],["B0","B1","B2","B3","B4"],["C0","C1","C2","C3","C4"],["D0","D1","D2","D3","D4"],["E0","E1","E2","E3","E4"]],"cpuCoordinates":[],"playerCoordinates":[],"playerSelections":[],"cpuSelections":[]}}' },
     generate: [Function] },
  sessionID: 'aHfVNblu917HOdlRR1kbIqb9JsUFfM-6',
  session: 
   Session {
     cookie: 
      { path: '/',
        _expires: 2016-10-11T03:18:48.163Z,
        originalMaxAge: 60000,
        httpOnly: true } },
  route: 
   Route {
     path: '/setShips',
     stack: [ [Object], [Object], [Object] ],
     methods: { post: true } } }
Session {
  cookie: 
   { path: '/',
     _expires: 2016-10-11T03:18:48.163Z,
     originalMaxAge: 60000,
     httpOnly: true } }
undefined
TypeError: Cannot read property 'BattleShip' of undefined
    at setPlayerShips (/Users/dfrank/code/projects/battleShip/api/game_controls.js:34:23)
    at Layer.handle [as handle_request] (/Users/dfrank/code/projects/battleShip/node_modules/express/lib/router/layer.js:95:5)
    at next (/Users/dfrank/code/projects/battleShip/node_modules/express/lib/router/route.js:131:13)
    at Route.dispatch (/Users/dfrank/code/projects/battleShip/node_modules/express/lib/router/route.js:112:3)
    at Layer.handle [as handle_request] (/Users/dfrank/code/projects/battleShip/node_modules/express/lib/router/layer.js:95:5)
    at /Users/dfrank/code/projects/battleShip/node_modules/express/lib/router/index.js:277:22
    at Function.process_params (/Users/dfrank/code/projects/battleShip/node_modules/express/lib/router/index.js:330:12)
    at next (/Users/dfrank/code/projects/battleShip/node_modules/express/lib/router/index.js:271:10)
    at Function.handle (/Users/dfrank/code/projects/battleShip/node_modules/express/lib/router/index.js:176:3)
    at router (/Users/dfrank/code/projects/battleShip/node_modules/express/lib/router/index.js:46:12)
    at Layer.handle [as handle_request] (/Users/dfrank/code/projects/battleShip/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/Users/dfrank/code/projects/battleShip/node_modules/express/lib/router/index.js:312:13)
    at /Users/dfrank/code/projects/battleShip/node_modules/express/lib/router/index.js:280:7
    at Function.process_params (/Users/dfrank/code/projects/battleShip/node_modules/express/lib/router/index.js:330:12)
    at next (/Users/dfrank/code/projects/battleShip/node_modules/express/lib/router/index.js:271:10)
    at session (/Users/dfrank/code/projects/battleShip/node_modules/express-session/index.js:438:7)

How do I access the session object that was initially created? Let me know if I can provide any more info. Thanks!