def validate_response(response)
      if (error = TwoCaptcha::RESPONSE_ERRORS[response])
        fail(error)
      elsif response.to_s.empty? || response.match(/\AERROR\_/)
        fail(TwoCaptcha::Error, response)
      end
    end
def validate_response(response)
      if (error = TwoCaptcha::RESPONSE_ERRORS[response])
        fail(error)
      elsif response.to_s.empty? || response.match(/\AERROR\_/)
        fail(TwoCaptcha::Error, response)
      end
    end
Fail if the response has errors.

 @param [String] response The body response from TwoCaptcha API.