---
sidebar_position: 2.6
tags: [account, security]
description: "Turn on two-factor authentication for your Lium account: an authenticator-app code at every sign-in, recovery codes, and turning it off."
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.lium.io/llms.txt
> Use this file to discover all available pages before exploring further.
>
> Lium (lium.io) is a GPU rental marketplace: rent NVIDIA GPUs by the hour, billed per second.

# Two-factor authentication

With two-factor authentication on, signing in to [lium.io](https://lium.io) asks for a 6-digit code from an authenticator app (Google Authenticator, 1Password, Authy and similar) after your password, Google, GitHub or fingerprint sign-in.

**Turn it on**

1. In [Account Settings](https://lium.io/profile), under **Two-factor authentication**, click **Turn on**.
2. If you signed in more than 10 minutes ago, enter your current password or sign in again.
3. Scan the QR code with your app, or type the key shown under it.
4. Enter the 6-digit code your app shows and click **Turn on**.
5. Save the recovery codes: they are shown once. Copy or download them, then click **I saved them**. Each code works once, in place of a code from the app.

Turning it on signs out every other browser and device signed in to your account. API keys keep working: if someone else may have one, delete it and create a new one under API keys.

**Sign in**

After the first sign-in step, enter the code from your app. No phone? Click **Use a recovery code** and enter one of your saved codes.

**Get new recovery codes**

Click **New recovery codes** and enter a code from your app or a recovery code. The old recovery codes stop working.

**Turn it off**

Click **Turn off** and enter a code from your app or a recovery code.

**Lost your phone and your recovery codes**

Contact [support](../security/official-support-and-scams.md#the-safest-way-to-contact-lium-support).