How to get NuGet package authors in PowerShell?

I want to get a NuGet packages information. I have already script , like this:

@( Get-Project -All | ? { $_.ProjectName } | %  {Get-Package -ProjectName $_.ProjectName } ) | ? { $_.LicenseUrl } | % {$pkg  = $_ ;

$pkg.Id is accessible$pkg.LicenseUrl is accessible

But I cannot understand when I print $pkg , the output contains Id, Versions,ProjectName. How to acces LicenseUrl .

$pkg.Authors is not accessible . I cannot any script for getting autohers from NugetPackages. Pls help me.