> ## Documentation Index
> Fetch the complete documentation index at: https://docs.xbox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Auth

> Browse XBOX services authentication topics, including user sign-in, the XBOX Authentication Library (XAL), XUser APIs, and troubleshooting guidance.

Explore auth topics for XBOX game development.

> [card] [User sign-in](https://docs.xbox.com/services/xbox-services/fundamentals/identity/auth/live-authentication-nav.md)
>
> This section covers authentication and account access, XAL, and XUser API topics.

> [card] [Account authentication and access](https://docs.xbox.com/services/xbox-services/fundamentals/identity/auth/live-authentication-overview.md)
>
> Use this topic to authenticate and access accounts, use the XBOX Authentication Library (XAL), and use XUser API contents.

> [card] [Troubleshooting XBOX services sign-in](https://docs.xbox.com/services/xbox-services/fundamentals/identity/auth/live-troubleshooting-sign-in.md)
>
> There are several common issues that can cause difficulty signing-in.

## See also

* [Privacy](https://docs.xbox.com/services/xbox-services/fundamentals/identity/privacy/index.md)
* [Privileges](https://docs.xbox.com/services/xbox-services/fundamentals/identity/privileges/index.md)
* [User profile](https://docs.xbox.com/services/xbox-services/fundamentals/identity/user-profile/index.md)


## Related topics

- [auth_token_validated](https://docs.xbox.com/services/playfab/api-references/events/PlayerIdentity/auth-token-validated.md)
- [S2s auth calls](https://docs.xbox.com/services/xbox-services/fundamentals/s2s-auth-calls/index.md)
- [Refresh PSN Auth Token](https://docs.xbox.com/services/playfab/api-references/rest/client/platform-specific-methods/refresh-psn-auth-token.md)
- [Get Player Id From Auth Token](https://docs.xbox.com/api-reference/account-management/get-player-id-from-auth-token.md)
- [Requesting a User Store ID from your service with X-tokens or OAuth 2.0](https://docs.xbox.com/publishing/xstore-commerce/xstore-requesting-userstoreid-oauth.md)