Feed Wizard: Authentication using composer keys
From XTENTO Support Wiki
This applies for both the Magento 1 & Magento 2 versions of our order export & product feed export extensions.
If you cannot or don't want to share your XTENTO logins however your client would like to import XSL templates in their export profiles using the template wizard, you can create new composer keys and use the composer user name instead. The composer keys can be generated when you log into xtento.com and go to the "Composer Authentication" tab:
In the export profile after you click the "Add New Profile" button, name the profile and click "Continue", the Feed Import Wizard shows up. Click here please:
You can then enter the composer user name here: