def region(region)
      if(region.to_s == 'us')
        config['api_host'] = US_API_HOST
      elsif(region.to_s == 'eu')
        config['api_host'] = EU_API_HOST
      else
        raise "Region Unknown"
      end
    end
def region(region)
      if(region.to_s == 'us')
        config['api_host'] = US_API_HOST
      elsif(region.to_s == 'eu')
        config['api_host'] = EU_API_HOST
      else
        raise "Region Unknown"
      end
    end
Set the correct api_host for US/EU