---
title: "Get an Authentication Instance"
url: https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/authentication/get-auth-instance/
description: "This page describes the method to fetch an authentication instance in your Web application with sample code snippets."
last_updated: 2026-09-08T11:07:33Z
service: Cloud Scale
type: general
related_links:
  - name: "Authentication"
    url: /en/cloud-scale/help/authentication/introduction
---

# Get an Authentication Instance

> **Note:** This SDK is currently in deprecation. Migrate to [JavaScript SDK](https://docs.catalyst.zoho.com/en/sdk/javascript/v1/cloudscale/authentication/add-user-to-org/) now.

The `auth` reference can be created to perform sign-in and sign-out operations.The following method will be used for this purpose and does not fire a server side call:

```javascript
//Get an Auth instance 
var auth = catalyst.auth;

```