> For the complete documentation index, see [llms.txt](https://dev.vulos.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev.vulos.io/reference/identity-javascript-sdk/the-backend-auth-package.md).

# The Backend Auth Package

This package contains the backend implementation for [`BaseAuth`](/reference/identity-javascript-sdk/the-base-package/authentication/baseauth.md).

`npm install @vulos/identity-node-sdk --save`

## Classes

{% content-ref url="/pages/Y5iji8ovndpDivDcGaA0" %}
[CodeVerifier](/reference/identity-javascript-sdk/the-backend-auth-package/codeverifier.md)
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{% content-ref url="/pages/0hjCk1zQx0oc6dJHkydn" %}
[BackendAuth](/reference/identity-javascript-sdk/the-backend-auth-package/backendauth.md)
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