Swift: Update Parse User (PFUser) and save image to it after new registration

I have been banging my head since yesterday. I have fetch profile picture from facebook and want to save it to parse. But I am stuck. I tried solution from this

How to update Parse user information in Swift?

That did not solved my case.

Updating user in Parse.com using Swift IOS8

I dont think this is the case, since I have just logged in. and my view changes too.

here's my code.

func updateCurrentUserProfilePicture(image: UIImage) {
        let currentUser = PFUser.currentUser()
        let id = currentUser?.objectId
        let data = UIImagePNGRepresentation(image)
        var query = PFUser.query()

        query!.getObjectInBackgroundWithId(id!) {
            (user: PFObject?, error: NSError?) -> Void in
            if error != nil {
                print(error)
            } else if let usr = user {
                // usr.setObject(data!, forKey: "image")
                usr["image"] = data!
                usr.saveInBackgroundWithBlock({ (result: Bool, error: NSError?) in
                    if error == nil {
                            self.delegate?.didUpdateProfilePictureWithResult!(true, error: error)
                    }else {
                        self.delegate?.didUpdateProfilePictureWithResult!(false, error: error)
                    }

                })
            }
        }
    }

I can see that didUpdateProfilePictureWithResult delegate is called with success. But when I go to back4app.com, I can see the user row but not the image column. And I dont see any error too.

What am I missing here?

Update I tried to save in in the console. It saved without any error.

**expression do { try usr.save()} catch { print(error)}**
2016-06-10 17:29:32.264 GeofenceMe2[39334:91037] Warning: A long-running operation is being executed on the main thread. 
 Break on warnBlockingOperationOnMainThread() to debug.
NilError

but still no image column in my dashboaard

You cannot save NSData to parse. Checkout the valid data types here: https://parse.com/docs/ios/guide#objects-data-types.

You are querying for the user object using the same user object. You can just use PFUser.currentUser().

func updateCurrentUserProfilePicture(image: UIImage) {
    let avatar = PFFile(name: PFUser.currentUser()!.username, data: UIImagePNGRepresentation(image)!)
    PFUser.currentUser()!.setObject(avatar!, forKey: "avatar")
    PFUser.currentUser()!.saveInBackgroundWithBlock { (success: Bool, error: NSError?) in

    }
}