How to check the selected settings in the Vkontakte iframe application?

Question

JavaScript

Good day.
There is an iframe VK application and you need to access the user's wall.
Actually, it turns out to display a request for obtaining access rights to the wall, but it’s not good if this request is displayed every time the application is launched. Accordingly, it is necessary to check what settings are currently selected for the user.
My validation code

VK.api("account.getAppPermissions", {user_id:10} ,function(data) {
if(data.response < 8450) {
document.getElementById('top-start-text').innerHTML = data.parse(' score');
VK.callMethod("showSettingsBox", 8450);
}
});

And it doesn't work. I would be grateful if someone can help with advice or working code.

Answer 1

user_id 10?
do a console.log(data) first to understand what the query returns.
Can be incorrectly counted a mask (the sum in sense) the rights?