INTRODUCTION
There are different sets of privileges to create and manage database instances and to allow a user to configure the database instances for a project. Here is how give a user permission to modify the database instances for a project while not necessarily allowing them to create or modify database instances.
Step 1 - Under 16. Administration, give the user 'Configure Project Data Source' privilege. (note it is different from 'Create and edit database instances and connections'.
Step 2 - Log in with the user and check that he now has the ability to manage the database instances tab in the project configuration window as shown in the image below.
