public function installUsers()
    {
        $this->_userService = new erdiko\users\models\User();

        $results = array(
            "successes" => array(),
            "failures"  => array(),
        );

        foreach($this->_usersArray as $user) {

            // get role ID from the name
            $user["role"] = $this->_getRole($user["role"])->getId();

            // create the user
            $createResult = (boolean)$this->_userService->createUser($user);

            unset($user["password"]);

            if(true !== $createResult) {
                $results["failures"][] = $user;
            } else {
                $results["successes"][] = $user;
            }
        }

        return $results;
    }