Public/PageService/Remove-CWCSession.ps1

function Remove-CWCSession
{
    [CmdletBinding(SupportsShouldProcess)]
    param (
        [Parameter(Mandatory = $True)]
        [guid[]]$GUID,
        [Parameter(Mandatory = $True)]
        [string]$Group
    )

    $Endpoint = 'Services/PageService.ashx/AddEventToSessions'

    $SessionEventType = 21
    $Body = ConvertTo-Json @(@($Group), @($GUID), $SessionEventType, '')

    $WebRequestArguments = @{
        Endpoint = $Endpoint
        Body = $Body
        Method = 'Post'
    }
    if ($PSCmdlet.ShouldProcess($WebRequestArguments.Body, "Remove-CWCSession")){
        Invoke-CWCWebRequest -Arguments $WebRequestArguments
    }
}