Creating alternate Plesk users only for one webspace

Hello,

I'm trying to find tutorial how to create new Plesk users, but without success.

I will explain what I need.

I added few Webspaces to our plesk.
And I don't want to add admin user to developers to access to all webspaces, but only the webspace that they develope.
The most important is to access to phpmyadmin only for that webspace databases

How to do that?