Migrating Emails

I am moving to a new hosting service that doesn't offer VirtualMin :(

They only offer Cpanel. I can manually migrate my webpages, databases, and mailfiles... but how do migrate my users passwords? Is there a way to either retrieve the users passwords in bulk from virtualmin? Or perhaps a way to copy an authentication file over after I create new accounts?

I am currently using the default VirtualMin with dovecot > PAM setup...

Thanks in advance...