PFQueryTableViewController Class Query Error

I wanna setup a basic PFQuery Table View Controller. I wanna display the usernames from my User class. I've added the User class to query on, but it gives this error message: *Property 'className' not found on object of type 'InboxViewController '

I don't understand why happens this, because the user class exists, it appears in the data browser. I've tried to make a property in the .h file, but it was unsuccessful.

#import "InboxViewController.h"
#import <Parse/Parse.h>
#import "LoginViewController.m"

@interface InboxViewController ()

@end
@implementation InboxViewController

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self) {
        // Custom the table
        // The className to query on
        self.className = @"User";
        // The key of the PFObject to display in the label of the default cell style
        self.textKey = @"username";
        // Uncomment the following line to specify the key of a PFFile on the PFObject to display in the imageView of the default cell style
        // self.imageKey = @"image";
        // Whether the built-in pull-to-refresh is enabled
        self.pullToRefreshEnabled = YES;
        // Whether the built-in pagination is enabled
        self.paginationEnabled = YES;
        // The number of objects to show per page
        self.objectsPerPage = 25;
    }
    return self;
}

#pragma mark - UIViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    PFUser *currentUser = [PFUser currentUser];

    if (currentUser) {
        NSLog(@"Current user: %@", currentUser.username);
    } else {
        [self performSegueWithIdentifier:@"showLogin" sender:self];
    }
}

.h file

#import <UIKit/UIKit.h>
#import <Parse/Parse.h>

@interface InboxViewController : PFQueryTableViewController

- (IBAction)logout:(id)sender;

@end