title: wp multisite: add new super admin
body: <p>How to create new super admin with wp multisite? </p>
  
  <p>I have phpmyadmin access, admin wp-admin access, ftp access. </p>
  
  <p>I'm unable to find wp_users info from the database nor I'm not able to find user id from wp-admin to grant_super_admin(x); with functions.php</p>
  
  <p>Any idea how to crack this?</p>