Ref [Configure GitLab as an OAuth 2.0 authentication identity provider](https://docs.gitlab.com/ee/integration/oauth_provider.html)
1.
```
Name: oauth2-rs-demo
Redirect URI: http://oauth2-rs.lvh.me/auth/gitlab/callback
Scopes: read_user openid profile email
```
```
Client ID: "x*64"
Client Secret: "x*64"
```