You can add your ID/passport by pressing the action in your dashboard.
While completing your profile you will come across the page where you can upload your ID. If you paused the completion of your profile halfway the process, you will be able to find this page by following these steps:
Log in and click find work at the top of the page.
Click on any shift.
Apply for the shift.
This will redirect you to the page where you can upload your ID.