UserManager.php
private function loadFromFile()
    {
        if (is_file($this->_file)) {
            $this->_params = require($this->_file);
        } else {
            $this->_params = ['users' => []];
        }
    }
private function loadFromFile()
    {
        if (is_file($this->_file)) {
            $this->_params = require($this->_file);
        } else {
            $this->_params = ['users' => []];
        }
    }
load user data from config file