Please log on to shuffle admin portal, Shuffle administrator can add new users in bulk following below steps
1. Go to "Users"
2. Then click on "Bulk Registrations - Upload".
3. Once in this section, please click on "Bulk add user" button on left hand side of the page.
4. This will open up a window prompt , download the CSV file format first and add the details of all your users to this file.
5. Once file is ready containing the details of your users, click on choose file in bulk add users window and click "Upload".