Private/_StoreCredential.ps1

function _StoreCredential {
    $Domain = $Options_CredentialsDomainTextBox.Text
    $Username = $Options_CredentialsUsernameTextBox.Text
    $Password = $Options_CredentialsPasswordPasswordBox.SecurePassword

    $Credential = New-Object System.Management.Automation.PSCredential ("$Domain\$Username", $Password)

    $Credential | Export-Clixml -Path $env:APPDATA\LoganShell\Stored.xml
}