Postman: How to properly expand and assert response?

Question

I have my assertion written like this:

pm.expect(response.validations.Result).to.eql("valid");

With it I am trying to test if the Result is valid, But I am unsure how to get through the "0: {...}" level Postman considers it as undefined - "Check if request is successful | AssertionError: expected undefined to deeply equal 'valid'"

The response structure looks like that:

{jobStatus: "success", startDateTime: "10/28/2022 11:39:23 AM", endDateTime: "10/28/2022 11:39:33 AM"…}
 jobStatus: "success"
 startDateTime: "10/28/2022 11:39:23 AM"
 endDateTime: "10/28/2022 11:39:33 AM"
  validations: [1]
   0: {…}
     Type: "duplicates"
     Result: "valid"

So any ideas what is this "0: {...}" is and how to work with the path "validations -> 0:{...} -> Results and check if the Result is valid?

pm.expect(response.validations.Result).to.eql("valid");

I have tried response.validations{0} or {...} , I have tried using dots, quotes, round brackets, curly brackets, and nothing worked so far.