OAUTH2 C# POST TD Ameritrade Getting error

Question

User-2004102533 posted

 I am now attempting to use the refresh_token that is valid for 90 days to get an auth token.  I get an error "":\"Failed to resolve API Key variable request.header.un\"\n \t\t}\n" this is from my C# . I am sure my refresh_token is accurate.  Here is the code:

           string     url = string.Format("https://api.tdameritrade.com/v1/oauth2/token");
            RestClient client = new RestClient(url);
            RestRequest postRequest = new RestRequest(Method.POST);
            postRequest.AddHeader("cache-control", "no-cache");
            postRequest.AddHeader("content-type", "application/x-www-form-urlencoded");
            postRequest.AddParameter("application/x-www-form-urlencoded", "grant_type=refresh_token&    refresh_token=[e-mail]", ParameterType.RequestBody);//, ParameterType.RequestBody)

            

   //  This is where the post is executed
            IRestResponse response = client.Execute(postRequest);

Answer 1

User283571144 posted

Hi DoctorWhoKnew,

According to the tdameritrade auth article:

To request a new access token, make a Post Access Token request with your refresh token using the following parameter values:

grant_type: refresh_token
refresh_token: {REFRESH TOKEN}
client_id: {Consumer Key}

I found your requrest parameter doesn't contain the client id, I guess this is why your codes doesn't work, I suggest you could modify your postRequest.AddParameter method and add the client id and try again.

Best Regards,

Brando

Answer 2

User55524441 posted

Hi,

Were you able to get it fixed? Can you please share the fix?

Thanks

Answer 3

User1465842319 posted

Hello, 

Any Luck on it. ?

If Yes, Kindly share the solution

Answer 4

User-2004102533 posted

I did find a solution. I needed to encode the refresh_token.  Here is the code:

var parameters = new Dictionary<string, string>
{ { "grant_type", "refresh_token" }, { "refresh_token", refresh_token_ }, { "client_id", client_id} };
var encodedContent = new FormUrlEncodedContent(parameters);

var response = await _httpclient.PostAsync(AmerOAuthUrl, encodedContent).ConfigureAwait(false);
if (response.StatusCode == HttpStatusCode.OK)
{
// Do something with response. Example get content:
var responseContent = await response.Content.ReadAsStringAsync ().ConfigureAwait (false);
AmerAccessToken amerAccessToken = JsonConvert.DeserializeObject<AmerAccessToken>(responseContent);
accessToken = amerAccessToken.access_token;
accessTokenTime = amerAccessToken.expires_in;
}

Answer 5

User1787365979 posted

Does anyone have any sample code to get me started, some of this is a bit over my head.  If I could just get a start I think I could hack my way through it.  Thanks