You can use two types of user access control.
You can add users and assigned them one of the built in roles. The screen is accessible from Application sharing menu.
In case you need to control user access in detail, you need to import Users and Roles from Marketplace extensions.
When you merge this extension into your application, you can:
- Control access level to every schema
- Hide schemas
- Make items inaccessible even for read
- Change access and visibility based on data and user, user groups and many others features
There is probably nothing to explain for basic requirements. When you add role, you can assigned it to a user. When you add a user, he/she can access the application.