box api - redirect url is not working in box app -

why redirect url not working when mention in box app?

steps

1.created new app 2.got api key, client_id , client_secret  3.gave redirect url http://localhost:3000 4.click app , add box account doesn't redirect local account,also   tried http://www.somesite.com , https://www.somesite.com 

but not working can please tell going wrong in creating app