How to pass the form value to the verification page?

[MauriceMarkslag]

Hi there!

I am wondering how I should write logic that provides my /verification path with the email address passed in the authentication page form action. The user signs in according to the docs (with SendGrid). Next, it redirects to /verification where I want to display a message including the email address.

I tried to return /verification?email=${user.email} in the signIn callback, but it expects a boolean as return value, otherwise it doesn't send the email. Neither can I leverage the redirect callback as it only has the url and baseUrl as arguments.

Any suggestions will be much appreciated! :)

I have noticed similar questions, but unfortunately they haven't been answered