struct Singleton {
static let instance : APIManager = APIManager()
}

public class APIManager: NSObject {
public class var sharedInstance: Manager {
return Singleton.instance
}

let manager = APIManager()

override init() {

}

//MARK:====Login====`enter code here`

//MARK: methods

 func login(username: String, password: String, completion: @escaping (_ user: user, _ success: Bool) -> (), failed:@escaping (_ error: NSError) -> ()) -> Request {
 let urlRequest = "http://fladsrihvyg3ufjld.cvshowcase.com/ios/mobile/signup"// Create a URLRequest and pass to the method

 return manager.request(urlRequest)

  .validate()
  .responseJSON { response in
    if let error = response.result.error {
      failed(error: error)
      print(error)
      return;
    }
    let ok = ((response.result.value as! JSONDictionary)["success"] as? Bool)!
    let userJson = JSON((response.result.value as! JSONDictionary)["user"]!)

    let token = ((response.result.value as! JSONDictionary)["token"] as? String)!
    NSUserDefaults.standardUserDefaults().setValue(token, forKey: UserDefaultKey.Token)
    NSUserDefaults.standardUserDefaults().synchronize()
    let user = User(json: userJson)
    completion(user: user,success: ok)
   }
  }
}