                 completionHandler(nil, error)
                 return
             }
-            
         }
     }
     

                success_lock.try()
                success = true
                success_lock.unlock()
            }) { (response, error) in
                success_lock.try()
                guard success else {

                    if !(response.hasPrefix("1") || response.hasPrefix("2")) {
                        throw FileProviderFTPError(message: response)
                    }
                } catch {
                    completionHandler(error)
                }
            }
        }
