public GoogleAccessTokenResponse GetAccessTokenFromRefreshToken(string refreshToken)
{
// Declare the POST data
NameValueCollection postData = new NameValueCollection {
{ "client_id", ClientIdFull },
{ "client_secret", ClientSecret },
{ "refresh_token", refreshToken },
{ "grant_type", "refresh_token" }
};
// Make a call to the server
JsonObject json = SocialUtils.DoHttpPostRequestAndGetBodyAsJsonObject("https://accounts.google.com/o/oauth2/token", null, postData);
// Check for an error message
if (json.HasValue("error"))
{
throw new Exception(json.GetString("error"));
}
// Parse the JSON response
return(GoogleAccessTokenResponse.Parse(json));
}