# Unique Login

### Overview

Unique Login is a Launcher feature that lets users log in to one device at a time. If the user successfully logs in to a second device, Launcher will force the original device to log out. This feature provides users with a unique log-in and unique log-out experience across all corporate-owned shared-user devices.

### Feature Configuration

To set up the Unique Login feature for a particular device profile or device group, please follow the steps below:

#### Enabling Unique Login using API Key

If enforceUniqueLogin is set to true, then the Unique Login feature will be enabled in the Launcher. If the organization uses an API key, it must be included in the configuration to enforce the feature.

```json
{
    ...
    "uniqueLogin": {
        "enforceUniqueLogin": true,
        "apiKey": "--- organization api key ---"
    }
    ...

}
```

#### Enabling Unique Login using Key Management

If the organization is using the Key Management feature, the API key field can be left blank. Set the value enforceUniqueLogin to true to enable the Unique Login feature.

```json
{
    ...
    "uniqueLogin": {
        "enforceUniqueLogin": true
    }
    ...

}
```

{% hint style="info" %}
Unique Login was introduced in Launcher 3.18.10.
{% endhint %}


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