We have sorted out your issue.
There are certain restrictions to give direct access to the user. However you can do most of the things from our Dashboard.
But in this special case as you mentioned that wp-config.php was uploaded to PaaS server by mistake which resulted in error establishing connecting to DB as while starting up Word Press tries to connect to DB to get all the information.
However we cannot give direct access to the server vm but we will definitely give a solution on our Dashboard for such type of situations.