code: def count
        old_value = @count
        @count = 1
        res = client.find_objects(@table, compile.as_json, _opts ).count
        @count = old_value
        res
      end
docs: Perform a count query.
   @example
    # get number of songs with a play_count > 10
    Song.count :play_count.gt => 10
  
    # same
    query = Parse::Query.new("Song")
    query.where :play_count.gt => 10
    query.count
   @return [Integer] the count result