func checkDeviceRegistry() -> Bool {
        var found: Bool = false
        Alamofire.request("http://10.51.200.249:3000/api/devices").responseJSON {
            response in
                if let json = response.value as? [String: Any] {
                    print(json)
                    found = true
                    return
                }
            print("\(String(describing: response.response))")
        }
        return found
    }