PowerShellでサービスの実行ユーザーを設定する

$svc = "*SQLAgent*"
$user = "testuser"
$pass = "testpass"

#Win32_ServiceのChangeメソッドの全パラメータ
$displayName = $null
$pathName = $null
$serviceType = $null
$errorControl = $null
$startMode = $null
$desktopInteract = $null
$startName = $user
$startPassword = $pass
$loadOrderGroup = $null
$loadOrderGroupDependencies = $null
$serviceDependencies = $null

$wmi = Get-WMIObject win32_service | Where-Object { $_.Name -like $svc }
$wmi.Change($displayName, $pathName, $serviceType, $errorControl, $startMode, $desktopInteract, $startName, $startPassword, $loadOrderGroup, $loadOrderGroupDependencies, $serviceDependencies)

uint32 Change(
  [in] string  DisplayName,
  [in] string  PathName,
  [in] uint32  ServiceType,
  [in] uint32  ErrorControl,
  [in] string  StartMode,
  [in] boolean DesktopInteract,
  [in] string  StartName,
  [in] string  StartPassword,
  [in] string  LoadOrderGroup,
  [in] string  LoadOrderGroupDependencies[],
  [in] string  ServiceDependencies[]
);