Invoke-RestMethod does not return response headers #9769
Description
Background
I am responding my client request with 401 and sending back respond header with WWW-Authenticate: basic realm="apps" by following https://tools.ietf.org/html/rfc7235#section-4.1.
I can test it using postman. But I cannot use invoke-RestMethod because it does not return anything while 401.
Steps to reproduce
Invoke-RestMethod -Method Get -uri http://www.bing.comcomcomc -ResponseHeadersVariable aa
$aa # it's empty
Expected behavior
headers should be displayed even if server response with error code.
Actual behavior
headers are empty if server responses with 401.
Environment data
6.1