谷歌安全认证

我需要查询谷歌的一个服务。我读了这个答案: download csv from google insight for search
从该问题复制和粘贴的代码是:

using (var client = new WebClient())
    {
        // TODO: put your real email and password in the request string
        var response = client.DownloadString("https://www.google.com/accounts/ClientLogin?accountType=GOOGLE&Email=youraccount@gmail.com&Passwd=secret&service=trendspro&source=test-test-v1");
        // The SID is the first line in the response
        var sid = response.Split('\n')[0];
        client.Headers.Add("Cookie", sid);
        byte[] csv = client.DownloadData("http://www.google.com/insights/search/overviewReport?q=test&cmpt=q&content=1&export=2");

        // TODO: do something with the downloaded csv file:
        Console.WriteLine(Encoding.UTF8.GetString(csv));
        File.WriteAllBytes("report.csv", csv);
    }

我想知道发送字符串中的密码是安全的还是可以被抓取?

如果这不安全,应该怎么做?