How can I add 2nd Readyview App user via phone

How can I get app to connect to ReadyView system with wife as 2nd user?

Trying to connect wife’s as 2nd user on her iPhone 8 Plus via ReadyView app. App goes to password change screen after QR code scanned. Stuck on password change screen. Password was already set when 1st user (me) installed app on admin’s iPhone.