Create an account via Dashboard (Users > Add new) with administrator role http://prntscr.com/s3rc9m > provide us with username and password via the Private Content area http://prntscr.com/s5mao7 You can use any email for it.
Also, we need FTP access. If you do not know how to create FTP, contact your hosting provider, they will help you.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.