Cli based tool that assists with collecting client id's for the various devices of a given plex user/account.
Going down the rabbit hole of various automations Plex Webhooks has to offer, I came across webhooks-notifications. The installation steps included getting an auth token via POST request to their API as well as another GET request to fetch the clients under your account.
There were various posts on this forum of people showing their methods of gathering this information; however, the website