Not clear which file you are sticking the code into.

Hi,
It is not clear from your docs which file you are sticking your code into and if you have an interface we can easily access from the WP dashboard.
I don’t see your code in the wp-content/themes/functions.php where I expected to find the filter.
1. Where is the file that I edit to add and verify who get alerts.
2. Is there access from the WP Dashboard, and if no, why not?
3. Why does it need ManageWP to work?

Thanks! Cool tool potentially, but right now a bit confusing.
Ken