PowerShell script for getting all users from a particular Sitefinity site.

Get-AllUsers

function Get-AllUsers {
param (
  [string] $siteUrl = "",
  [string] $username = "",
  [string] $password = ""
)

if ($siteUrl -eq "")
{
  $siteUrl = Read-Host "Site URL";
}

if ($username -eq "")
{
  $username = Read-Host "Username"
}

if ($password -eq "")
{
  $password = Read-Host "Password"
}
 
function isHttpUri($address) { 
  $uri = $address -as [System.URI] 
  $uri.AbsoluteURI -ne $null -and $uri.Scheme -match '[http|https]' 
} 

if (-Not (isHttpUri($siteUrl))) {
  Write-Host "Invalid URL. Exiting."
}

$jsonContextType = "application/json"
$sitefinityUsersService = "Sitefinity/Services/Security/Users.svc"

$authenticateMethod = $siteUrl + $sitefinityUsersService + "/Authenticate"
$forceLogoutMethod = $siteUrl + $sitefinityUsersService + "/ForceLogout"
$logoutWithCredentialsMethod = $siteUrl + $sitefinityUsersService + "/LogoutCredentials"
$getAllUsersMethod = $siteUrl + $sitefinityUsersService + "/all"

$logoutParameters = "{""UserName"":""" + $userName + """,""Password"":""" + $username + """}"
$authenticationParameters = "{""MembershipProvider"":"""",""UserName"":""" + $userName + """,""Password"":""" + $password + """}"

$logoutWithCredentialsMethodResponse = Invoke-WebRequest $logoutWithCredentialsMethod -Method Post -ContentType $jsonContextType -Body $authenticationParameters
$authenticateMethodResponse = Invoke-RestMethod $authenticateMethod -Method Post -ContentType $jsonContextType -Body $authenticationParameters -SessionVariable session

$getAllUsersMethodResponse = Invoke-WebRequest $getAllUsersMethod -ContentType $jsonContextType -WebSession $session

($getAllUsersMethodResponse.Content | ConvertFrom-Json).Items
}