> For the complete documentation index, see [llms.txt](https://docs.infotopics.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.infotopics.com/writebackextreme/features/power-bi-extension/authentication/username-setup.md).

# Username setup

Some authentication methods require a **calculated username** to be passed from Power BI to WriteBackExtreme.

This is only required when using one of the following authentication methods:

* Username + Password
* Pincode
* No Authentication

#### Create a username measure

To retrieve the current Power BI user, create a new **measure** in your semantic model using the following DAX formula:

```
Username = USERPRINCIPALNAME()
```

More information about the difference between `USERNAME()` and `USERPRINCIPALNAME()` can be found here:\
<https://community.fabric.microsoft.com/t5/Power-BI-Community-Blog/USERNAME-v-s-USERPRINCIPALNAME-in-RLS-for-Power-BI-Embedded/ba-p/1867670>

#### Add the username to the visual

1. Select the **WriteBackExtreme visual**
2. Open the **visual settings sidebar**
3. Add the created measure to the **Username field**

The username will now be passed to WriteBackExtreme during authentication.

<figure><img src="/files/8fZCAZ5vqx4WXb5B6PvI" alt=""><figcaption></figcaption></figure>


---

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