What Am I Doing Wrong - If Else Swift

This is my code. I asked for help previously but got no response but I think I have fixed it. Essentially, want to disable a button if the count is higher than a specific number. I am printing out the count and it is correct however when I implement it in a if else statement, it is not working.

What am i doing wrong? Any help would be greatly appreciated! Thanks.

      func checkPurchase() {
        
        guard let uid = Auth.auth().currentUser?.uid else { return }
        
        Database.database().reference().child("users").child(uid).child("Posts").observe(DataEventType.value, with: { (snapshot) in
          print(snapshot.childrenCount)
          let imagesPurchase = snapshot.childrenCount
            print(imagesPurchase)
            
            Purchases.shared.purchaserInfo { [weak self] info, error in
                
                guard let info = info, error == nil else { return }
                                        
                if info.entitlements.all["Premium"]?.isActive == false && snapshot.childrenCount < 0 {
                    DispatchQueue.main.async {
                        self?.AddPicture.isEnabled = false
                    }
                } else {
                    print("Hi")
                }
            
        }
        
        }
        )
        }