How do I change the author of a custom post type?

I have made a custom post type and need to be able to create posts and assign them to authors. It is easy to do this with posts as you can go to the bulk edit screen and immediately change the author. However, when I try to do this with my custom post type the author box is not there. How do I add the functionality to change the author of my custom post type?

EDIT: I found a solution, see answer below.

in Custom Post Type register arguments array use this

'supports' => array('title', 'editor', 'thumbnail', 'comments', 'author'),

This will activate author box on the edit screen. After registering author to cpt you need to activate author from edit screen option ( top of the edit screen where you can enable/disable all metabox ) to display authorbox on the edit screen.