var userSchema = mongoose.Schema({
  userData: {
    name: { type: String, required: true, unique: true },
    password: String
  },
  notes: [ String ],
  contacts: [{
    name: String,
    notes: [ String ]
  }],
  locations: [ String ]
});

each user in allUsers
  p #{user.userData.name}

app.get('/', function(req, res) {
  if (app.locals.userData.name) {
    res.render('app', {
      currentUser: app.locals.userData,
      allUsers: User.find({})
    });
  } else {
    res.redirect('signup');
  }
});