[bug-fix] fixed error handling in signup
[bug-fix] fixed error handling in signup

Mavmeister/KrakenBooks,szwang/OmniBooks,yoshi415/OmniBooks,yoshioka-s/OmniBooks,Mavmeister/KrakenBooks,szwang/OmniBooks,yoshioka-s/OmniBooks,SillyKnight/OmniBooks,SillyKnight/OmniBooks,yoshi415/OmniBooks