Blank password in createuser

I'm trying to create a user in my build train with a blank password. So far I've tried [code]password="" [/code] and [code]password='' [/code] and many variations on [code] ./shadowHash "">password_hash [/code] All variations of running ./shadowHash to get the desired result have resulted in a password_hash file containing "Invalid password". Reading the shadowHash script I found these lines: [code]if (empty($password)) { die("Invalid password"); [/code] so I'm guessing shadowHash isn't the way to go. Is there another way to get the desired result?