Plex

I host a Plex server for our household, which includes a couple of teenagers. All members of the household (myself included) have a PIN protected managed user profile on our Plex server.

The problem is, if I let the teenagers have my Plex account password to login to our Plex server, it automatically logs them in with the Home Admin profile, whereas I'd much rather it force them to select from the list of profiles on our server (eg. just like Netflix does).

This means that, every now and then, I have to manually go to whichever new device they want to run Plex on (such as a Playstation) and handle the login process myself, so I can be certain they're logged in with their own user profile - not the Home Admin profile.

I've set a PIN on the Home Admin profile, but that doesn't help unless you've already logged in first, then go to use fast user switching to select a different profile. On very first login, Plex will always auto-select the Home Admin profile.

I've searched high and low, but can't find any info or settings that help me change this behaviour.

So, my question is simple: is it possible to prevent auto-login as the Home Admin profile, and force selection from the list of managed users instead?

Thanks in advance.

EDIT: I should have provided more details about what I've tried so far. We have tested out using a separate Plex user account for the oldest kid, as all the reading I did suggested she would "inherit" my server's Plex Pass rights when streaming from it.

But, we found that the iPhone app could still stop playback after a minute. Plus we couldn't log her account onto the shared Chromecast TV, so she could watch her shows on the house TV. So we ended up moving her back to a managed user profile on our server.

EDIT 2: after some more reading, it now seems the mobile app must either be logged in with a Plex Pass account (mine, in our case) or the user has to pay a once-off fee to unlock it.

I could've sworn it was different when I first read about it a year or two back, where the app would "inherit" the server's rights, but I guess that's either faulty memory or they changed the rules. The once off unlock fee isn't a big problem, so that's one hurdle overcome.

The second problem is how to use multiple Plex accounts on the Plex app for Chromecast, so the kids can enjoy their content on the big screen when they want to. Has anyone cracked the code on how to achieve that?