We're planning a trip. We're all adults, but I'm the planner. I have had the others install the Disneyland app on their phones. Do they need to create their own logins, or can they just use mine? If that, can we all be signed in under my login at the same time? They'll probably just use the app while in the parks for this one trip and then never again. This is likely our only trip to Disneyland.