I want to add someone to my PLUS subscription, but their profile is not appearing as an option

In order for a user to be added to a PLUS subscription:
โˆ™ Please have the other user log in to a shared device (Music Choice on TV, mobile app, etc) that the primary user has also previously logged in on.
โˆ™ Refresh dashboard.musicchoice.com. 
โˆ™ The other user should appear as an option to be added to your PLUS subscription.