public function adm_self_add_user(
		$args, $pass_twice=null, $email_required=null
	) {
		if ($this->store_is_logged_in())
			return [AdminStoreError::USER_ALREADY_LOGGED_IN];
		return $this->adm_add_user(
			$args, $pass_twice, true, $email_required);
	}