Passing extra fields between the login form and delivery function

[iplanwebsites]

I need to give some context to my email notifications. I can personalize the login form accordingly with extra values.
Is it possible to access my hidden fields values (req.body) in the "sendToken" route?
I might be missing something, but 'm not sure how it'd be possible to access the req/res context within the passwordless.requestToken function.
Thanks!