Basic Data Structures: Check if an Object has a Property

https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-data-structures/check-if-an-object-has-a-property

This task doesn’t use the obj argument in:
function isEveryoneHere(obj)

?

Im not sure I get what you mean. Its passing in obj as a parameter and calls it with users. The name you chose for the parameter isnt relevant for it to work.