To add an Account open Shopify go to Apps -> DHL eCommerce.
The Dashboard will open. On the right side, you can find the DHL Accounts, but at the moment there are not any. Click on View or here.
The details of the Accounts will now be displayed, but no accounts are available yet, so you have to click on Add New Account or here.
Now you are on the Add New Account Page. DHL eCommerce should already be selected. Please fill out the gaps with your user data and click on Save. The related DHL eCommerce locations show your Shopify locations, these locations you can use with your Account.