Need to upload multipart form data( video, image with params) in background until upload is not finished no matter app is in background or switched to other app or terminated.

This Code is not working. Any Help will be appreciated.

func UPLOAD_VIDEO_WITH_DATA(_ video: [UploadImageInfo], param: [String: Any]) {
    if !APIManager.isConnectedToNetwork() {
        APIManager().networkErrorMsg()
        return
    }
    
    let url = URL(string: API.CAMPAIGN.create)!
    var request = URLRequest(url: url)
    
    let boundary = "Boundary-\(NSUUID().uuidString)"
    var body = Data()
    
    body.append(boundary)
    body.append("--\(boundary)\r\n")
    body.append("Content-Disposition: form-data; name=\"params\"\r\n")
    body.append("Content-Type: application/json\r\n\r\n")
    body.append("\(param)")
    body.append("\r\n")
    
    let tempDirectoryURL = FileManager.default.temporaryDirectory
    let videoURL = tempDirectoryURL.appendingPathComponent("video.mp4")
    
    for videoInfo in video {
        if videoInfo.video != nil {
            if let videoData = videoInfo.data {
                try? videoData.write(to: videoURL)
                body.append("--\(boundary)\r\n")
                body.append("Content-Disposition: form-data; name=\"video\"; filename=\"\(videoInfo.video?.absoluteString)\"\r\n")
                body.append("Content-Type: video/mp4\r\n\r\n")
                body.append(videoData)
                body.append("\r\n")
            }
        }
    }
    
    body.append("--\(boundary)--\r\n")
    
    request.httpMethod = "POST"
    request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
    request.setValue("Bearer \(self.getMultipartHeaderWithToken())", forHTTPHeaderField: "Authorization")
    request.httpBody = body
    
    print(request)
    
    let session = URLSession(configuration: URLSessionConfiguration.background(withIdentifier: "com.app.Deloa.backgroundUpload"))
    DispatchQueue.global().async {
        let task = session.uploadTask(with: request, fromFile: videoURL)
        task.resume()
    }
}

public func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
    if let error = error {
        print("Error uploading data: \(error)")
    } else {
        print("Data uploaded successfully!")
    }
}

extension Data {
    mutating func append(_ string: String) {
        if let data = string.data(using: .utf8) {
            append(data)
        }
    }
}

Here is the data i am passing for video

`    override func selectedVideo(choosenVideo: URL, thumbnailImage: UIImage) {
        var selectedVideo = UploadImageInfo()
        selectedVideo.name = "video"
        selectedVideo.video = choosenVideo
        selectedVideo.data = try? Data(contentsOf: choosenVideo)
        selectedVideo.url = choosenVideo.absoluteString
        self.media.append(selectedVideo)

        var selectedThumbnail = UploadImageInfo()
        selectedThumbnail.name = "thumbnail"
        selectedThumbnail.image = thumbnailImage
        selectedThumbnail.data = compressImage(image: thumbnailImage)
        self.media.append(selectedThumbnail)
    }`

Upload Image struct

struct UploadImageInfo {
    var id: Int
    var name: String
    var image: UIImage?
    var video : URL?
    var thumbnail: UIImage?
    var data: Data?
    var url: String?

    init() {
        name = ""
        image = nil
        video = nil
        id = 0
        thumbnail = nil
        data = nil
        url = nil
    }
}