test.ps1

function Get-PowerView {
    [CmdletBinding()]
    [OutputType([string[]])]
    Param (
        [Parameter(Mandatory=$false,
                   ValueFromPipeline=$true,
                   ValueFromPipelineByPropertyName=$true,
                   Position=0)]
        [string]$ComputerName = "localhost",

        [Parameter(Mandatory=$false,
                   ValueFromPipeline=$true,
                   ValueFromPipelineByPropertyName=$true,
                   Position=1)]
        [string]$ScriptBlock = "Get-NetUser"
    )

    Begin {
        $ErrorActionPreference = "Stop"
        $PSSession = New-PSSession -ComputerName $ComputerName -Credential $Credential
        Invoke-Command -ScriptBlock $ScriptBlock -Session $PSSession
    }
    Process {
        $Results = Receive-PSSession $PSSession
        Write-Output $Results
    }
    End {
        Remove-PSSession $PSSession
    }
}