def get_drive_files_list(folder)
      ls = Hash.new
      page_token = nil
      begin
        (files, page_token) = folder.files("pageToken" => page_token)
        files.each do |f|
          ls[f.original_filename] = f
        end
      end while page_token
      return ls
    end
def get_drive_files_list(folder)
      ls = Hash.new
      page_token = nil
      begin
        (files, page_token) = folder.files("pageToken" => page_token)
        files.each do |f|
          ls[f.original_filename] = f
        end
      end while page_token
      return ls
    end
Get all file from drive folder