Customize login page as separate page

Hello, I installed version 1.5.0 of Apache Guacamole, I wanted to test how complex it is to modify the appearance of the start screen (login) of Apache Guacamole.

I managed to add a 3D animation with the three.js library and I intend to continue adding other designs.

However, I have a problem, when I log in correctly, the animation and the layout of the login page remain within the connection management interface.

Is it possible to separate the login page from the connection management page?

Video demo