Disable Backend User Groups

Disabling user group UI items is a great way of decluttering your backend for projects that don't use the features.

Firstly, this code is required in your plugin's Plugin.php:

use Backend\Controllers\Users as BackendUserController;
// ...
    public function boot()
    {
            BackendUserController::extend(function ($controller) {
                    $controller->listConfig = $controller->makeConfig($controller->listConfig);
                    $controller->listConfig->toolbar = array_merge($controller->listConfig->toolbar, ['buttons' => '$/acme/blog/partials/toolbar.users.htm']);
            });

            BackendUserController::extendListColumns(function ($list, $model) {
                    $list->removeColumn('groups');
            });

            BackendUserController::extendFormFields(function($form, $model, $context) {
                    $form->removeField('groups');
            });
    }

Make sure to replace acme/blog with the name of your plugin.

Finally, create the file partials/toolbar.users.htm in your plugin's root directory, with the following code:

<div data-control="toolbar">
    <a href="<?= Backend::url('backend/users/create') ?>" class="btn btn-primary oc-icon-plus">
        <?= e(trans('backend::lang.user.new')) ?>
    </a>
    <?php if ($this->user->isSuperUser()): ?>
        <a href="<?= Backend::url('backend/userroles') ?>" class="btn btn-default oc-icon-address-card">
            <?= e(trans('backend::lang.user.role.list_title')) ?>
        </a>
    <?php endif ?>
</div>