[APP][Pro] Samsung SmartTV

I want to generate a smasung API token for my TV. The TV is already registered in the Samsung cloud and I see it there. The question is which options should I click on so that I can control my TV via Homey. What I want is that when someone presses the doorbell, a snapshot appears on the TV via the chromecast. That already works. What doesn’t work is to go back to hdmi1 after 3 seconds. To get that working I need an API token but I don’t know what to choose from the list.