"[{\"message\":\"Session expired or invalid\",\"errorCode\":\"INVALID_SESSION_ID\"}]"

I reviewed the other questions posted but no answers helped. I am using grant type "password".

On my authenticate call I get this back (values changed to protect the innocent):

  "access_token": "00BLARDEBLAR..",
  "instance_url": "https://blar.salesforce.com",
  "id": "https://test.salesforce.com/id/00BLAH/00BLHABLHA",
  "token_type": "Bearer",
  "issued_at": "1611009241343",
  "signature": "A99SigAmature"

Here's how i'm trying to use it:

string response = message.Content.ReadAsStringAsync().Result;
JObject obj = JObject.Parse(response);

// I have confirmed these values match the response.
string AuthToken = (string)obj["access_token"];
string ServiceUrl = (string)obj["instance_url"];

// versionEndpoint = "/services/data/v50.0"
string EndPointURL = ServiceUrl + login.versionEndpoint;

content = new FormUrlEncodedContent(new Dictionary<string, string>
    {"Authorization", "Bearer " + AuthToken},
    {"X-PrettyPrint", "1"}

message = Client.PostAsync(EndPointURL + "/sobjects/", content).Result;
response = message.Content.ReadAsStringAsync().Result;

And this is when I get back:

"[{\"message\":\"Session expired or invalid\",\"errorCode\":\"INVALID_SESSION_ID\"}]"

What am I missing? TIA


The way you're calling it, you're putting data into the body. You need to use the Headers attribute instead.

content = new FormUrlEncodedContent(new Dictionary<string, string>
{ // Whatever body elements you need goes here
content.DefaultRequestHeaders.Authorization = "Bearer " + AuthToken;

See also this question on Stack Overflow, which basically says the same thing.

  • Ah. Ok thanks. This makes sense. But now it's telling me System.InvalidOperationException: 'Misused header name. Make sure request headers are used with HttpRequestMessage, response headers with HttpResponseMessage, and content headers with HttpContent objects.' I'll poke around a bit. content is defined as HttpContent – flashsplat Jan 19 at 3:53
  • @flashsplat Looks like DefaultRequestHeaders.Authorization is the correct property here. See this answer on Stack Overflow. – sfdcfox Jan 19 at 10:23
  • Boom! That got me on the right track. Thank you. Got one more error after that saying I couldn't POST, so I switched to GET and now i'm cookin'! Thanks again! – flashsplat Jan 19 at 15:10
  • It won't let me upvote your answer do to my rep :(. – flashsplat Jan 19 at 15:11
  • @flashsplat You're welcome. I edited in the answer. – sfdcfox Jan 19 at 15:38

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