# Custom Auth Popups You can fully customize the authentication popups. There are new variables that you can set in the Backoffice: * AUTH\_SERVICE\_HTML * AUTH\_POPUP\_SUCCESS\_HTML * AUTH\_POPUP\_FAIL\_HTML * AUTH\_PRE\_HTML The AUTH\_SERVICE\_HTML is the popup for API Key and Password authentication., The AUTH\_POPUP\_SUCCESS\_HTML is displayed when the authentication is successful, the AUTH\_POPUP\_FAIL\_HTML is displayed if the authentication fails. And the AUTH\_PRE\_HTML is used for connectors that have the `pre` field defined in the auth.js file (to gather additional information before the authentication). To modify the popup, go to the *System* section in the Backoffice and add a new *Key.* Let's say we want to modify the popup for Api Key connectors.

At the bottom of this page, you will find the default HTML files. You can use them and modify them, or you can create your own. We are going to change the text to:

Then you paste the whole HTML into the Backoffice.

And this is the result:

### Default HTML files {% file src="" %} Default auth-service.html {% endfile %} {% file src="" %} {% file src="" %} {% file src="" %} Default auth-pre.html {% endfile %}