Can someone please just give me the correct code to enter at the end of this?

// // SignupViewController.m // Memory Jar // // Created by Chris Stahl on 12/29/15. // Copyright © 2015 Memory Jar. All rights reserved. //

import "SignupViewController.h"

import <Parse/Parse.h>

@interface SignupViewController ()

@end

@implementation SignupViewController

• (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. }

• (IBAction)signup:(id)sender { NSString *username = [self.usernameField.text stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceAndNewlineCharacterSet]]; NSString *password = [self.passwordField.text stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceAndNewlineCharacterSet]]; NSString *email = [self.emailField.text stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceAndNewlineCharacterSet]]; NSString *phone = [self.phoneField.text stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceAndNewlineCharacterSet]];

  if ([username length] == 0 || [password length] == 0 || [phone length] == 0 || [email length] == 0) { UIAlertController * alert= [UIAlertController alertControllerWithTitle:@"Oops!" message:@"Please enter a Username, Passoword & Email Address" preferredStyle:UIAlertControllerStyleAlert];

  UIAlertAction* ok = [UIAlertAction
                       actionWithTitle:@"OK"
                       style:UIAlertActionStyleDefault
                       handler:^(UIAlertAction * action)
                       {
                           [alert dismissViewControllerAnimated:YES completion:nil];
  
                       }];
  UIAlertAction* cancel = [UIAlertAction
                           actionWithTitle:@"Cancel"
                           style:UIAlertActionStyleDefault
                           handler:^(UIAlertAction * action)
                           {
                               [alert dismissViewControllerAnimated:YES completion:nil];
  
                           }];
  
  [alert addAction:ok];
  [alert addAction:cancel];
  
  [self presentViewController:alert animated:YES completion:nil];
  

  } else { PFUser *newUser = [PFUser user]; newUser.username = username; newUser.password = password; newUser.email = email;