"Invalid JSON payload received. Unknown name "image": Cannot find field.";
                }

override func viewDidLoad() {
    super.viewDidLoad()
    receipts = CoreDataHelper.retrieveReceipts()

    let url = baseURL + apiKey

    let sampleImage = UIImage(named: "sample")

    let image = UIImageJPEGRepresentation(sampleImage!, 1.0)?.base64EncodedString()

    let params: Parameters = ["requests": ["features": ["type": "LABEL_DETECTION"]], "image": ["content": image]]





    Alamofire.request(url, method: .post, parameters: params, encoding: JSONEncoding.default).responseJSON { (response) in
        print(response)
    }