A PowerShell script that returns a Zendesk user.

ZendeskAPI-GetUser.ps1

param(
    [Parameter(Mandatory=$true)][String]$userID
)

#Zendesk API Connection Headers Referencing System Environmental Variables for username and API token.
$headers = @{Authorization = 'Basic ' + [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes("$($env:ZendeskAPI_Username):$($env:ZendeskAPI_Token)"));}

$userURI = "https://yourdomain.zendesk.com/api/v2/users/$userID.json"
$user = Invoke-RestMethod -Uri $userURI -Method Get -Headers $headers -ContentType "application/json"
$user = $user.user
return $user