So, with Laravel Horizon here, I ventured to use it. I found something though, it is possible, but VERY difficult to get the current user in the App Service Provider.
I set out a different route, using IP Addresses.
Since our office has a static IP, I modified the following:
.env - Adding the remote addresses as a JSON encoded array to a new variable
REMOTE_ADDRESSES='["xxx.xxx.xxx.xxx"]'