> ## Documentation Index
> Fetch the complete documentation index at: https://devdocs.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.

<CardGroup cols={2}>
  <Card title="User sign-in" icon="right-to-bracket" href="/services/xbox-services/fundamentals/identity/auth/live-authentication-nav">
    This section covers authentication and account access, XAL, and XUser API topics.
  </Card>

  <Card title="Account authentication and access" icon="database" href="/services/xbox-services/fundamentals/identity/auth/live-authentication-overview">
    Use this topic to authenticate and access accounts, use the XBOX Authentication Library (XAL), and use XUser API contents.
  </Card>

  <Card title="Troubleshooting XBOX services sign-in" icon="lightbulb" href="/services/xbox-services/fundamentals/identity/auth/live-troubleshooting-sign-in">
    There are several common issues that can cause difficulty signing-in.
  </Card>
</CardGroup>

## See also

* [Privacy](/services/xbox-services/fundamentals/identity/privacy/index)
* [Privileges](/services/xbox-services/fundamentals/identity/privileges/index)
* [User profile](/services/xbox-services/fundamentals/identity/user-profile/index)


## Related topics

- [Auth](/services/xbox-services/fundamentals/identity/auth/index.md)
- [auth_token_validated](/ja-jp/services/playfab/api-references/events/PlayerIdentity/auth-token-validated.md)
- [S2s auth calls](/services/xbox-services/fundamentals/s2s-auth-calls/index.md)
- [Request a User Store ID with X-tokens or OAuth 2.0](/publishing/xstore-commerce/xstore-requesting-userstoreid-oauth.md)
- [X-token 또는 OAuth 2.0으로 User Store ID 요청](/ko/publishing/xstore-commerce/xstore-requesting-userstoreid-oauth.md)