code: def raw_exchange_rates
        table_rows = Oga.parse_xml(response.body).xpath('Details/rates')
        # EDBE porvide 5 as 20 XML attributes
        fail ResponseError, 'Unknown HTML' unless table_rows&.size == 1
        table_rows.flat_map(&:attributes).take(20)
      end
docs: Send the request to the URL and retrun raw data of the response
   @return [Array<Oga::XML::Attribute>]
     [
       Attribute(name: "USDBbuy" value: "17.2500"),
       Attribute(name: "USDBsell" value: "17.7000"),
       Attribute(name: "USDTbuy" value: "17.2500"),
       Attribute(name: "USDTsell" value: "17.6000"),
       ...
     ]