It's simple and easy to install this plugin. With a few easy steps, you would get an amazing User Management System for your application.

Here is what you will need -

Latest CakePHP 3.x installed on your system, follow process from CakePHP Official Website.
Download UMP 3.x plugin from Ektanjali Softwares.

just follow the steps mentioned in README file comes with UMP-3.3.x plugin and your plugin is installed and your application is ready to use with an amazing User Management System.