Link Dreamweaver to Visual Studio Team Services

We are using VSTS for many c# projects. All goes well. Now we want to add the sources of our webdesigner too to a repo in VSTS. His tool of choice for designing the sites is Dreamweaver.

We've set up a git connection to VSTS via console and all works fine. We installed the plugin described here : https://helpx.adobe.com/dreamweaver/using/git-support.html

We can see the repo, see the states of files, but as soon as we want to push/pull using the dreamweaver plugin it fails. It seems that the way dreamweaver is performing the authentication is not the VSTS way.

Any suggestions ?