search dropbox folder

I was trying the search func that returns a SearchResult but I couldnt get it working.  here is some of my code.

 hope this helps.  I really appreciate your help 

// MARK: - UISearchBarDelegate
    
    func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
        var data = [String]()

        
        // IN HERE I WANT TO SEARCH MY APPS FOLDER IN DROPBOX AND POPULATE THE "data" STRING ARRAY WITH THE FILE NAMES OF ALL THE FILES IN THE FOLDER


        
        filtered = data.filter({ (text) -> Bool in
            let tmp: NSString = text as NSString
            let range = tmp.range(of: searchText, options: NSString.CompareOptions.caseInsensitive)
            return range.location != NSNotFound
        })
        
        if(filtered.count == 0){
            searchActive = false
        } else {
            searchActive = true
        }
 
        searchTableView.reloadData()
        
        // These next two lines dynamicaly adjust the Search TableView's height
        super.updateViewConstraints()
        self.searchTableViewHeightConstraint?.constant = self.searchTableView.contentSize.height
    }