Can the welcome email be changed?

Just wondering if there's a template somewhere for the welcome email. That's the one that new Perch users get when the Perch Administrator adds them to the list of allowed editors?

I'd like to add something to it, directing that new user to where they can change the password to something they want (rather than setting the password to 'changeme' or the long generated password we normally set). And also include some links to basic videos we have on how to use Perch.

If not possible, please take as a suggested enhancement sometime please? Thanks, Graham