How to use FileManager with admin permissions programmatically

Hello,

I have a max os application that is supposed to copy files into /Library/Application Support folder.

I found a piece of code that performs the authorization with authentication and even creates the rights successfully.

Right after I try to perform a priviledged operation like creating a directory in /Library/Application Support folder.

I get a no permission error 513. How do I use the authorization I created. Seems like my case suits self-restricted application authorization. But I'm missing something there. Will appreciate your help. Here is the code I use to gainAccess:

Thanks in advance

privatefunc gainPermissions() {
        var authorizationRef: AuthorizationRef? = nil
        var authItem = AuthorizationItem(name: "xmpie.com.XMPieInstaller.filesRight", valueLength: 0, value: nil, flags: 0)
        var authRights = AuthorizationRights(count: 1, items: &authItem)
        let flags: AuthorizationFlags = [.interactionAllowed, .preAuthorize, .extendRights]
        var authStatus = AuthorizationCreate(&authRights, nil, flags, &authorizationRef)
        guard let authRef = authorizationRef else {
            NSLog("Failed to get authorization! \(authStatus) - \(String(authStatus: authStatus))")
            return
        }
        authStatus = AuthorizationCopyRights(authRef, &authRights, nil, flags, nil)
        NSLog("Auth status #\(authStatus) - \(String(authStatus: authStatus))")

        let paths = NSSearchPathForDirectoriesInDomains(.applicationSupportDirectory, .localDomainMask, true)
        if paths.count != 0 {
            let resolvedPath = paths[0] as NSString
            let resolvedPath1 = resolvedPath.appendingPathComponent("XMPieTest")
            do {
                try FileManager.default.createDirectory(atPath: resolvedPath1, withIntermediateDirectories: true, attributes: nil)
            } catch let error as NSError {
               print(error.localizedDescription);
            }