Thank you very much for the answer as well as the effort put into the development of this plugin 
As for the installation - it went as smooth as it can be.
HOWEVER - I am facing one problem that you might shed some light on.
How can I use this plugin on several sites, based on the same machine?
I have installed the plugin using the “test” site and when I try to install it using the production site - I get warnings during the installation with:
sudo bash install.sh production 588KEYh0xhg PAASS --upgrade
WARNING: Target directory /omd/sites/production/local/share/checkmk-telegram-plus/bin already exists. Specify --upgrade to force replacement.
AND as a result - the BOT created on Telegram - does not start…
I have tried a KEY that has working bot BUT the “target” does not change in the working BOT - it stays with the “test” site.
Might be something that I keep overlooking thaugh…