text: let users = [{
    id: 1,
    name: 'Tamas',
    cars: [1, 2]
  }, {
    id: 2,
    name: 'Susan',
    cars: []
  }, {
    id: 3,
    name: 'Steven',
    cars: [3]
  }];
  
  let cars = [{
    id: 1,
    make: 'Ford',
    model: 'Focus',
    colour: 'red',
    ownedBy: 1
  }, {
    id: 2,
    make: 'Fiat',
    model: '500',
    colour: 'blue',
    ownedBy: 1
  }, {
    id: 3,
    make: 'Mercedes',
    model: 'C250',
    colour: 'silver',
    ownedBy: 3
  }];
  
  module.exports = {
    users,
    cars
  };