ComponentHelper::getWorkgroupAvatarToken

static function getWorkgroupAvatarToken($fileId = 0): string
{
	if ($fileId <= 0)
	{
		return '';
	}

	$filePath = CFile::getPath($fileId);
	if ((string)$filePath === '')
	{
		return '';
	}

	$signer = new BitrixMainSecuritySignSigner;
	return $signer->sign(serialize([ $fileId, $filePath ]), 'workgroup_avatar_token');
}