$hdrs = @{}
$hdrs.Add("X-Qlik-xrfkey","12345678qwertyui")
$hdrs.Add("X-Qlik-User","UserDirectory=jprdonnelly;UserId=justin")
$cert = Get-ChildItem -Path "Cert:\CurrentUser\My" | Where {$_.Subject -like '*QlikClient*'}
$url = "https://sense.browntown.local:4242/qrs/about?xrfkey=12345678qwertyui"
Invoke-RestMethod -Uri $url -Method Get -Headers $hdrs -Certificate $cert