Powershell learning exercise - trying to output a true or false

Hi Experts,
This is learning exercise for me.. 
I am trying work out how to check for local admin rights on a server and result a true or false.

My idea was to check if I can read the Security log, but my attempt at this approach always provides a True, regardless of result of Get-WinEvent. 


$eventcheck = Get-WinEvent -FilterHashtable @{logname='security'} -MaxEvents 1
 
    if (!($eventcheck)) {
    $Adminrights = $false }
    else {
    $Adminrights = $true }
    
    return $Adminrights


Any tips much appreciated.
Cheers
String

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