How to ad Apps@trufla.com as an admin
You will need to give Trufla access to your account as an admin to be able to create the apps and update them on your behalf.
...
Accept terms and conditions on your behalf
Update payment information on your behalf
How to add apps@trufla.com as an admin account on your apple developer account?
Sign in to developer.apple.com/account, and click People.
...