What is wrong in my code?

Tell us what’s happening:
Describe your issue in detail here.

  **Your code so far**
function checkObj(obj, checkProp) {
// Only change code below this line
if(check.hasOwnProperty(checkProp)){
  return obj[checkProp];
} else {
  return "Not Found";
}
// Only change code above this line
}
  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36

Challenge: Testing Objects for Properties

Link to the challenge:

What is check in the check.hasOwnProperty()?