immich/docs/docs/usage/oauth.md

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# OAuth Authentication
This page contains details about using OAuth 2 in Immich.
## Overview
Immich supports 3rd party authentication via [OpenID Connect][oidc] (OIDC), an identity layer built on top of OAuth2. OIDC is supported by most identity providers, including:
- [Authentik](https://goauthentik.io/integrations/sources/oauth/#openid-connect)
- [Authelia](https://www.authelia.com/configuration/identity-providers/open-id-connect/)
- [Okta](https://www.okta.com/openid-connect/)
- [Google](https://developers.google.com/identity/openid-connect/openid-connect)
## Prerequisites
Before enabling OAuth in Immich, a new client application needs to be configured in the 3rd-party authentication server. While the specifics of this setup vary from provider to provider, the general approach should be the same.
1. Create a new (Client) Application
1. The **Provider** type should be `OpenID Connect` or `OAuth2`
2. The **Client type** should be `Confidential`
3. The **Application** type should be `Web`
4. The **Grant** type should be `Authorization Code`
2. Configure Redirect URIs/Origins
The **Sign-in redirect URIs** should include:
- All URLs that will be used to access the login page of the Immich web client (eg. `http://localhost:2283/auth/login`, `http://192.168.0.200:2283/auth/login`, `https://immich.example.com/auth/login`)
- Mobile app redirect URL `app.immich:/`
:::caution
You **MUST** include `app.immich:/` as the redirect URI for iOS and Android mobile app to work properly.
**Authentik example**
<img src={require('./img/authentik-redirect.png').default} title="Authentik Redirection URL" width="80%" />
:::
## Enable OAuth
Once you have a new OAuth client application configured, Immich can be configured using the Administration Settings page, available on the web (Administration -> Settings).
| Setting | Type | Default | Description |
| ------------------- | ------- | -------------------- | ------------------------------------------------------------------------- |
| OAuth enabled | boolean | false | Enable/disable OAuth2 |
| OAuth issuer URL | URL | (required) | Required. Self-discovery URL for client (from previous step) |
| OAuth client ID | string | (required) | Required. Client ID (from previous step) |
| OAuth client secret | string | (required) | Required. Client Secret (previous step) |
| OAuth scope | string | openid email profile | Full list of scopes to send with the request (space delimited) |
| OAuth button text | string | Login with OAuth | Text for the OAuth button on the web |
| OAuth auto register | boolean | true | When true, will automatically register a user the first time they sign in |
:::info
The Issuer URL should look something like the following, and return a valid json document.
- `https://accounts.google.com/.well-known/openid-configuration`
- `http://localhost:9000/application/o/immich/.well-known/openid-configuration`
The `.well-known/openid-configuration` part of the url is optional and will be automatically added during discovery.
:::
[oidc]: https://openid.net/connect/