@russell If you edited your browser to clear history, cookies and cache like me and want to check easily your remote or local PiHole. With API key you have admin access to your PiHole, so you don't have to type password anytime you want to tweak it. Its more convenient in short, for me atleast.
@nikolal thanks for the explanation, that's give me the idea that other apps (like note taking that points to a self-hosted note taking app) could be made for similar functionality
@russell
There is Nextcloud Notes for that, I use it and its pretty cool