This code will check user notification subscription status on PushBots and toggle Push Notifications:

  [Pushbots getDevice:^(NSDictionary *device, NSError *error) {
    if(device != nil){
        NSLog(@"Current Subscription status: %d", [[device valueForKey:@"sub"] boolValue]);
        [Pushbots toggleNotifications:![[device valueForKey:@"sub"] boolValue]];
        NSLog(@"Updated Subscription status: %d", ![[device valueForKey:@"sub"] boolValue]);

    }
}];
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