var sessionManager: SessionManager!
let configuration = URLSessionConfiguration.default
    configuration.httpAdditionalHeaders = SessionManager.defaultHTTPHeaders
    configuration.timeoutIntervalForRequest = timeout
    configuration.timeoutIntervalForResource = timeout
    self.sessionManager = Alamofire.SessionManager(configuration: configuration)

self.sessionManager.request(urlString, method: trMethod, parameters: Parameters, headers: Headers).responseJSON { response in