Additional admin users are required to sign up for their own account on TTR. During the sign up process they will be asked whether they want to create their own company or join an existing company.
The admin user to be would select “join an existing company” and search for the company they want to join as an admin. The primary admin user of the company will receive a “join request” via email that they will need to approve before the new admin user will have access to the account.
Alternatively you can add additional admin users via your dashboard by clicking on the Users section in the dashboard.