Never used UniServerZ, but if you're running it on your local computer:
If you don't already have a web server:
Download xampp and install.
If you don't have a website:
You can download znoteacc from github. Delete everything inside xampp/htdocs/ and add the znoteacc files.
Accessing PhpMyAdmin:
Visit 127.0.0.1/phpmyadmin/ in your web browser.
Importing game database:
Inside UniserverZ folder, there should be a schema(.sql) file. In PhpMyAdmin, create a new database, click SQL at the top and import the scheme file.
Importing extra znote tables
To import the extra tables for znoteacc, there is usually a schema file located in xampp/htdocs/engine/database. (I think, cant remember exactly where it is) Do the same thing as the previous step.
Editing your configs:
In both your game server config.lua, and the config.php in the htdocs folder, you will need to add the correct database details. If you have recently installed xampp, the default username and password will be "root" and "". (This is extreme unsecure, look into tutorials on how to create your own users and to disable default users). Database will be the name of the database you have created.