public function edit()
    {
        $config = $this->app->make(Repository::class);
        $this->set('form', $this->app->make('helper/form'));
        $this->set('data', $config->get('auth.external_concrete5', []));
        $this->set('redirectUri', $this->urlResolver->resolve(['/ccm/system/authentication/oauth2/external_concrete5/callback']));

        $list = $this->app->make(GroupList::class);
        $list->includeAllGroups();
        $this->set('groups', $list->getResults());
    }