Need to change admin account

SO I am probably confused…

When I sign onto PMS (not often because once I am sighed in, it stays that way) I used my email account for that. If I make the change in Plex, would I then just use the new email account?

Same goes for Plex Forums… Would I use the new email to sign in there?

And what about PlexPass… will that move with the email change?