mongoose problem z populate

Question

Witam, populate nie działa ma ktoś może jakiś pomysł dlaczego?

gdy próbuje wylogować w konsoli category to dostaję "ReferenceError: category is not defined"

wydaje mi się że jest jak w dokumentacji ale jak widać tylko mi się wydaje

//model/Category.js

const mongoose = require("mongoose");
const Schema = mongoose.Schema;

const CatSchema = new Schema({
    title: {
        type: String,
        required: true
    },
    body: {
        type: String,
        required: true
    }
});


mongoose.model("categories", CatSchema, "categories");


//model/Story.js

const mongoose = require("mongoose");
const Schema = mongoose.Schema;

const StorySchema = new Schema({
    title: {
        type: String,
        required: true
    },
    body: {
        type: String,
        required: true
    },
    category: {
        type: Schema.Types.ObjectId,
        ref: "categories"
    },
    allowComments: {
        type: Boolean,
        default: true
    },
    comments: [{
        commentBody: {
            type: String,
            required: true
        },
        commentDate: {
            type: Date,
            default: Date.now
        },
        commentUser: {
            type: Schema.Types.ObjectId,
            ref: "users"
        }
    }],

    date: {
        type: Date,
        default: Date.now
    }
});


mongoose.model("stories", StorySchema, "stories");

//routes/stories.js
const express = require('express');
const router = express.Router();
const mongoose = require('mongoose');
const Category = mongoose.model('categories');
const Story = mongoose.model('stories');

router.get('/add', (req, res) => {
    Story.find()
        .populate('category',  'title')
        .then(stories => {
            res.render('stories/add', {
                stories: stories
            });
        });
});



// views/stories/add       
     <p>{{stories.category.title}}</p>