Checking if given username and password is valid in PowerShell

IsUserValid.ps1

# -- Get the full script here : https://github.com/VimalShekar/PowerShell/blob/master/CheckIsUserValid_1.ps1
function IsLocalUserNamePasswordValid()
{
    param(
    [String]$UserName,
    [String]$Password
	)

    $DS = New-Object System.DirectoryServices.AccountManagement.PrincipalContext('machine',$ComputerName)
    $bReturn = $DS.ValidateCredentials($UserName, $Password)    
    return $bReturn
}

function IsDomainUserNamePasswordValid()
{
    param(
  [String]$UserName,
	[String]$Password,
	[String]$DomainName
	)
    $DS = New-Object System.DirectoryServices.AccountManagement.PrincipalContext('domain',$DomainName)
    $bReturn = $DS.ValidateCredentials($UserName, $Password)
    return $bReturn
}


#Example Usage:
#IsLocalUserNamePasswordValid -UserName TestLocalUser1 -Password Test@Pass1
#IsDomainUserNamePasswordValid -UserName TestDomUser1 -Password Test@Pass1 -DomainName testdom.local