Allow automatic sign-in on Roku for users besides primary user

Plex for Roku has an automatic sign-in feature (good, so you don’ t have to input the PIN every single time).
https://support.plex.tv/hc/en-us/articles/204275243-Settings-Plex-for-Roku

However, this feature only exists for the primary admin account. It is not an option in the settings for other users within the account, which means if you want to do anything besides expose all your libraries, you still have to force the Roku to sign-in every single time.

Well it appears this has been implemented, but in a horribly broken way. Managed Users can turn it on, but that also turns it on for the Primary user, so if the Primary User doesn’t check their settings every time they log on, they could be inadvertently leaving their username wide open for login without a PIN. I’m sure anyone who actually thought about this would agree that if this is implemented for Managed Users the setting should only apply for the user who set it, not globally for all users!

if as the Admin user (or any user), when you are done watching, you return to the user selection screen before you leave the TV/computer/Smart Phone -

There will be no login that is wide open, any user that requires a PIN will still need to enter it to go back into that users account

Early 2021 clean-up: implemented (OP)