public/Get-TNGroupMember.ps1

function Get-TNGroupMember {
    <#
    .SYNOPSIS
        Gets a list of group members
 
    .DESCRIPTION
        Gets a list of group members
 
    .PARAMETER SessionObject
        Optional parameter to force using specific SessionObjects. By default, each command will connect to all connected servers that have been connected to using Connect-TNServer
 
    .PARAMETER GroupId
        The ID of the target group
 
    .PARAMETER EnableException
        By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message.
        This avoids overwhelming you with 'sea of red' exceptions, but is inconvenient because it basically disables advanced scripting.
        Using this switch turns this 'nice by default' feature off and enables you to catch exceptions with your own try/catch.
 
    .EXAMPLE
        PS C:\> Get-TNGroupMember -GroupId 10
 
        Gets a list of group members for Group ID 10
 
#>

    [CmdletBinding()]
    param
    (
        [Parameter(ValueFromPipelineByPropertyName)]
        [object[]]$SessionObject = (Get-TNSession),
        [Parameter(Mandatory, ValueFromPipelineByPropertyName)]
        [int32]$GroupId,
        [switch]$EnableException
    )
    process {
        foreach ($session in $SessionObject) {
            if ($session.MultiUser) {
                $groupparams = @{
                    SessionObject = $session
                    Path          = "/groups/$GroupId/users"
                    Method        = 'GET'
                }

                (Invoke-TNRequest @groupparams).users | ConvertFrom-TNRestResponse
            } else {
                Stop-PSFFunction -EnableException:$EnableException -Message "Server ($($session.ComputerName)) for session $($session.sessionid) is not licenced for multiple users" -Continue
            }
        }
    }
}