$ mongo
$ db.content.find().count()
  6
$ db.users.find().count()
  4

const mongoose = require('mongoose')
const Schema = mongoose.Schema
const ContentSchema = new Schema({})
const Content = mongoose.model('content', ContentSchema)

Content.count({}, function (err, c) {
  if (err) console.log(err)
  console.log('Content document: ' + c)
})

module.exports = Content

const mongoose = require('mongoose')
const Schema = mongoose.Schema
const UserSchema = new Schema({ _id: String })
const Users = mongoose.model('user', UserSchema)

Users.count({}, function (err, c) {
  if (err) console.log(err)
  console.log('User document: ' + c)
})

module.exports = Users

const Users = require('./models/Users')
const Content = require('./models/Content')

Content document: 0
User document: 4