Issue FileManager and ServerFileManager permission issue

[sfsdg]

I'm need to copy subdomain files to new domain folder, i have a custom extension. This extension using pm_ServerFileManager class's copyFile method. But files are copying with root user? If I use pm_FileManager extension return Permission error like "filemng failed: filemng: stat failed: Permission denied. System error 13: Permission denied"

Here is my code;

protected function _run()
    {
        $from = $this->_params["from"];
        $to = $this->_params["to"];
        $defaultDbUsername = $this->_params["defaultDbUsername"];
        $defaultDbPassword = $this->_params["defaultDbPassword"];

        $domain = new \pm_Domain();

        $fromDomain =  $domain->getByDomainId($from);
        $toDomain =  $domain->getByDomainId($to);
  
        $fromDomainDocumentRoot = $fromDomain->getDocumentRoot();
        $toDomainDocumentRoot = $toDomain->getDocumentRoot();

        $fileManager = new \pm_FileManager($to);

        //Yükleme yapılacak site klsörünü temizleme
        $toFilePath = $fileManager->scanDir($toDomainDocumentRoot, true);
        foreach ($toFilePath as $value) {
            $fileManager->removeFile($toDomainDocumentRoot . "/" . $value);
        }

        //Wordpress yükleme
        $fromFilePath = $fileManager->scanDir($fromDomainDocumentRoot, true);
        foreach ($fromFilePath as $value) {
            $fileManager->copyFile($fromDomainDocumentRoot . "/" . $value, $toDomainDocumentRoot);
            //$fileManager->chmod($fromDomainDocumentRoot . "/" . $value, "755");
        }

        $toFileContents = $fileManager->fileGetContents($toDomainDocumentRoot . "/wp-config.php");

        $domainName = $domain->getName();

        $toFileContents = preg_replace('/define\(\'DB_NAME\', \'(.*?)\'\);/', "define('DB_NAME', '$domainName');", $toFileContents);
        $toFileContents = preg_replace('/define\(\'DB_USER\', \'(.*?)\'\);/', "define('DB_USER', '$defaultDbUsername');", $toFileContents);
        $toFileContents = preg_replace('/define\(\'DB_PASSWORD\', \'(.*?)\'\);/', "define('DB_PASSWORD', '$defaultDbPassword');", $toFileContents);

        $fileManager->filePutContents($toDomainDocumentRoot . "/wp-config.php", $toFileContents);


        return [
            'status' => true,
        ];
    }

This return like that result

<?xml version="1.0" encoding="UTF-8"?>
<packet version="1.6.8.0">
  <extension>
    <call>
      <result>
        <status>error</status>
        <errcode>1002</errcode>
        <errtext>filemng failed: filemng: stat failed: Permission denied

System error 13: Permission denied</errtext>
      </result>
    </call>
  </extension>
</packet>

If I use pm_ServerFileManager class code works perfectly but files are copy with root user;

Edit:
I'm researching already for this post. And everybody says like "this is not possible". But wp-toolkit and "Plesk Web Clone" doing this, how?

 

[sfsdg]

If customers are custom (not Administrator) and different or same I can copy files between domains. This is local, if I go to real server on the I can't do this.