What do I add to this code to include additional CPTs?

To nest a conditional OR wrap conditions with () and separate with ||.

if( ($screen->post_type=='item' || $screen->post_type=='product') && $screen->id=='item')

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)