func getUserLogin(username:String,password:String, onSuccess:@escaping(JSON)-> Void, onFailure: @escaping(Error)->Void){
        let url:String = baseURL+APIManager.getUserLogin
        let request: NSMutableURLRequest = NSMutableURLRequest(url: NSURL(string: url)! as URL)
        request.httpMethod="POST"
        let postString = "username="+username+"&password="+password
        request.httpBody = postString.data(using: .utf8)
        let session = URLSession.shared

        let task = session.dataTask(with: request as URLRequest,completionHandler:{data,response,error->Void in if(error != nil){onFailure(error!)

        }else {
            let result = JSON(data: data!)
            onSuccess(result)
            }

        })
        task.resume()

    }

let result = JSON(data: data!)
        onSuccess(result)