---
title: "User Logout"
url: https://docs.catalyst.zoho.com/en/sdk/ios/v2/cloud-scale/authentication/user-logout/
service: Cloud Scale
type: general
related_links:
  - name: "Authentication"
    url: /en/cloud-scale/help/authentication/introduction
  - name: "Users"
    url: /en/cloud-scale/help/authentication/user-management/users/introduction/
  - name: "Logout User - API"
    url: /en/api/code-reference/cloud-scale/authentication/sign-out-user/#SignOutUser
---


# User Logout

The **logout()** method can log an app user out from the Catalyst iOS app.

The code syntax for user logout is given below:

ZCatalystApp.shared.logout( completion : @escaping ( Error? ) -> Void )
ViewController.swift

**Parameters**:
* **completion**: The completion block will be passed with an error if the logout was unsuccessful.