I mis-wrote on my earlier post

I've seen a few older post about this issue, but I went to sign into iTunes Producer to upload a new book and it says my password needs to be 'app specific'. I've used iTunes Producer multiple times, posted two books in the past 2 years and see no way to sign a new password to get access. Everything else with my password is still working fine, but shut-out of the iTunes Producer application.Any ideas?

I goofed up and said I was having issues with iTunes Connect at first, but that works fine for me and displays my books. But iTunes Producer will not let me log in.