# Facebook Authorization Code Grant

Ref [Manually Build a Login Flow](https://developers.facebook.com/docs/facebook-login/manually-build-a-login-flow/)

## 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-web-app-demo
```

2. Add and configure "Facebook Login" Product

```
Valid OAuth Redirect URIs: https://oauth2-rs.lvh.me/auth/facebook/callback
```

3. Add an Test User, Roles > Testers


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

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