* Save client identifier from auth for future use
* Use websocket events to update Plex
* Handle websocket disconnections
* Use aiohttp, shut down socket cleanly
* Bad rebase fix
* Don't connect websocket during config_flow validation, fix tests
* Move websocket handling to external library
* Close websocket session on HA stop
* Use external library, revert unnecessary test change
* Async & lint fixes
* Clean up websocket stopper on entry unload
* Setup websocket in component, pass actual needed object to library
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