dektrium\rbac\RbacWebModule::checkAccess PHP Method

    public function checkAccess()
    {
        $user = \Yii::$app->user->identity;
        if (method_exists($user, 'getIsAdmin')) {
            return $user->getIsAdmin();
        } else {
            if ($this->adminPermission) {
                return $this->adminPermission ? \Yii::$app->user->can($this->adminPermission) : false;
            } else {
                return isset($user->username) ? in_array($user->username, $this->admins) : false;
            }
        }
    }