Hello, thank you for your response.
I know that I can modify the HTML of the page, but I have made some changes and I am not able to get what I want to.
Firstable, I do not know what exactly it is the code that introduces this variable $MERAKI:MODERN_AUTH_SPONSOR_INFORMATION_FORM$. In the inspector of the browser I can see that some script JS lines are added but when I try to do it by myself I cannot add any JS lines in the file.
Is there any full documentation about these variables?
Regards