Check if Object has a thousands of Property

hello guys!

my code below passed the test but i’m not still ok with it . what if the properties in the object were modified and i want the code to check if all the keys are in the object? for example, i have thousands of keys to check.

my passed code

let users = {
  Alan: {
    age: 27,
    online: true
  Jeff: {
    age: 32,
    online: true
  Sarah: {
    age: 48,
    online: true
  Ryan: {
    age: 19,
    online: true

function isEveryoneHere(obj) {
  // change code below this line
if (obj.hasOwnProperty('Alan', 'Jeff', 'Sarah', 'Ryan')) {
  return true;
else {
  return false
  // change code above this line


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Link to the challenge:

Hey Zuriel,
Next challenge should answer your question.