If you want your designer/programmer to have access to your account, you can create a sub-account under the Client Panel (Billing Area).
1) To do this, first log into our Client Dashboard
2) Click on the drop down on the top right -> Contacts/Sub-Account
3) Once you are on the page you will have to option to create a sub-account. Make sure you click on the Activate Sub-Account checkbox, once the checkbox is checked you can then select the permission this sub-account has to your account