correct API to embbed a sheet into web application

[Vilius]

Hello,

we have developed a Sales KPI Dashboard as a Qlik Sense application sheet. We need that data to be displayed on a TV set for daily  monitoring. Now we have two problems:

1. The fonts and some other visualization elements are too small for seeing data from 10-15 meters away.

2. If TV is turned off and then switched back on we constantly need to reauthenticate the browser to our QlikSense for Windows Enterprise instance.

I have decided to solve these issues by developing our own mini-web application and embedding QlikSense data into it, however given a myriad QlikSense API options I'm totally lost which one I should choose? Which QlikSense API would allow me: a) bypass authentication completely or automatically authenticate with a specified user (shared user for TV devices), and b) change Chart fonts, increase Straight Table cell size, etc.

[Marc]

If the Virtual Proxy you are communicating with uses Windows Authentication & both the Qlik Sense Server & the PC connected to the TV are on the Same domain, and you are logged into the PC using a domain account. 
Then you can add the Qlik Sense Server to the Trusted Sites in Internet explorer and it will use pass though authentication and you will not be prompted.

[Vilius]

There is no PC connected to TV. I'm using Android's default browser on the TV itself.