In this article, you will find more information on how to create and set up a test user account for the app reviewer.
1. Navigate to Users → All Users and click on Add user. On the sidebar that appears, proceed to fill in the user’s details along with a password.
2. Navigate to Mobile App → Review Team Account and add the details of the user you just created.
Save your changes.
Make sure to not use a personal email, as this user will be accessed by Apple and Google's reviewers' team whenever we push for a new update.
Once you set up your app reviewer and you are ready to launch your app, you will need to follow the steps here.