How can we improve WHMCS?

we need an option where anyone that has not verified their email address gets sent a verification email when we run a function or a cron

with well over 10000 clients its a pain to have to try and find who hasn't verified and then individually resend them out

i had considered writing a cron to do it but as theres a token generated etc this wont work as i dont have any knowledge on how the tokens are generated or how they interact with the emails that are sent out