# Username and password (Auth0)

As already mentioned above, you can link apps to users database under <mark style="color:red;">`Authentication`</mark> → <mark style="color:red;">`Database`</mark>. Another option is to navigate to your application (on Auth0), and under the <mark style="color:red;">`Connections`</mark> tab you will be able to individually toggle the options you want to have enabled for that specific application. By selecting a database connection, it will allow users registered on that database to login to your application using the username and password created under Auth0.

<figure><img src="/files/Q9YnGS9Uw1NJxcFNuPt0" alt=""><figcaption></figcaption></figure>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.klai.studio/engineering-reference-docs/setting-up-auth0/creating-a-database/choosing-different-login-options/username-and-password-auth0.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.