Account not found??????? – Period Tracker: Monthly Cycles Review

I’ve been using the same account on multiple devices for over the last 12 yrs. now I have to sign in?? Now I’ll lose all the info I have stores on my iPhone 11??? I made an account years ago. Before the app name change. So why now it doesn’t know my credentials Developers need to fix this
Review by Organy on Period Tracker: Monthly Cycles.