Moving my wife to her S7 from her old S5. 

I used smart switch, worked ok, games settings didn't come across or saved game info. 

She really only has 3 lots of data, and it seems it's synced into Google Play Games, and I can see her account on the old phone, but on the new phone, it's asking for a new gamer account name, and if I use her email address (Which is the one on the old device) or her name, it won't let me "sign in". it's greyed out. 

Any ideas?