Feat: Neurips submission pre-process

[celestemartinez]

The pre-process checks two things:

• that the user entered in fields corresponding_author, financial_support and reviewer_nomination is a co-author of the paper
• that if any co-author is a reviewer or AC, they have completed the registration task

Comment: the commented out code is how I tried to do it at first, but it was not working. I think it's because the thrown error would exit the inside function, but the outside one didn't know which error was being thrown (the user would just see "Something went wrong") Is there a better way to do this?

[celestemartinez]

[melisabok]

have you tested this with real data? how long does it take to do the post operation? I'm worried that it can take too long.