---
title: auth-device
description: Record device ids and attach device policy to auth sessions.
---

Install `auth-device` when login should record and reuse device ids. It depends
on `auth`.

```sh
lenso module install auth
lenso module install auth-password
lenso module install auth-device
cargo run --bin migrate
lenso serve
```

Password registration and login accept `device_id`. When present, the device
policy records the device and attaches it to the created session:

```sh
curl -sS -X POST http://127.0.0.1:3000/v1/auth/password/login \
  -H 'content-type: application/json' \
  -d '{"identifier":"ada@example.com","password":"correct horse battery staple","device_id":"macbook-1"}' | jq .
```

After restart, verify:

- The Modules page lists `auth-device`.
- Data includes device records after device-aware login.
- Auth sessions are associated with device policy data when `device_id` is
  supplied.