public void LogIn()
    {

        string username = "xxx";
        string password = "xxx";
        string url = "http://xxxxx/api/token/";

        HttpWebRequest tokenRequest = (HttpWebRequest)WebRequest.Create(url);
        string encoded = System.Convert.ToBase64String(System.Text.Encoding.GetEncoding("ISO-8859-1").GetBytes(username + ":" + password));
        tokenRequest.Headers.Add("Authorization", "Basic " + encoded);
        tokenRequest.Method = "POST";
        HttpWebResponse tokenResponse = (HttpWebResponse)tokenRequest.GetResponse();
        Debug.Log (tokenResponse);

    }