public function attributeLabels()
    {
        $attributeLabels = parent::attributeLabels();
        $attributeLabels['id'] = Yii::t('user', 'User ID');
        $attributeLabels['nickname'] = Yii::t('user', 'Nickname');
        $attributeLabels['first_name'] = Yii::t('user', 'First Name');
        $attributeLabels['last_name'] = Yii::t('user', 'Last Name');
        $attributeLabels['gf'] = Yii::t('user', 'Gender');
        $attributeLabels['createdFrom'] = Yii::t('user', 'From');
        $attributeLabels['createdTo'] = Yii::t('user', 'To');
        return $attributeLabels;
    }