# Facebook Device Authorization Grant

Ref [Facebook Login for Devices](https://developers.facebook.com/docs/facebook-login/for-devices)

## Prerequisites

1. Create a Facebook App

Audience

```
Which option best suits the audience you’re building this app for?

Manage integrations for your business
```

Type

```
Business or Consumer
```

Details

```
Display name: oauth2-rs-f-b-device-demo
```

2. Add and configure "Facebook Login" Product

Enable "Login from Devices"

3. Add an Test User, Roles > Testers


Ref https://developers.facebook.com/docs/facebook-login/access-tokens/#clienttokens

```
Your Client ID: (App ID in Settings > Basic)

Your Client Secret: (Client Token in Settings > Advanced > Security)
```