> For the complete documentation index, see [llms.txt](https://docs-v3.toucantoco.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs-v3.toucantoco.com/data-management-in-datahub/using-advanced-data-concepts/data-personnalisation-with-user-attributes/youprep-data-filtering-with-a-user-attribute.md).

# YouPrep data filtering with a user attribute

In this section, we'll explore the process of enhancing your data security through dynamic row-level filtering **with YouPrep**. By utilizing user attributes, you can efficiently filter tables and implement robust row-level security. This feature proves invaluable, especially in scenarios involving a multi-tenant data architecture where data for all users is consolidated within a single table.

{% hint style="info" %}
It's highly recommended as an App-builder to be **connected with an account that has the user attributes** used that are set. This ensures a smooth and efficient configuration process. If you are not connected with a user having those user attributes, the variables won't be listed in YouPrep.
{% endhint %}

Let's delve into the steps to seamlessly achieve this dynamic row-level filtering and fortify your data management within Toucan environment:

* Add a “Filter rows” step\
  ![](/files/GXDC9fG9BoFx0QpCU5FS)
* Select the column to filter on, and then click on the “Variable” icon and select the user attribute (customer\_id in the example below).\
  ![](/files/COqi8QTCvgA4kQxazUy5)

{% hint style="info" %}
Note that there is also a **dedicated feature called** [**Permissions**](/data-management-in-datahub/datasets-in-toucan/setting-permissions-on-dataset.md), that allows to configure Row-Level-Security on datasets.
{% endhint %}


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