func checkDeviceRegistry() -> Bool {
        var found: Bool = false
        let url = URL(string: "http://10.51.200.249:3000/api/devices")

        let task = URLSession.shared.dataTask(with: url!) { (data, response, error) in

            if let data = data {
                do {
                    // Convert the data to JSON
                    let jsonSerialized = try JSONSerialization.jsonObject(with: data, options: []) as? [String : Any]

                    if let json = jsonSerialized, let url = json["url"], let explanation = json["explanation"] {
//                        print(url)
//                        print(explanation)
                        print(json)
                    }
                }  catch let error as NSError {
                    print(error.localizedDescription)
                }
            } else if let error = error {
                print(error.localizedDescription)
            }
        }

        task.resume()
        return found
    }