How can I make proper request for the Identity Server Token Endpoint? - asp.net

Question

I tried to send an api call to the identity server via .net 6 console application.
Here is the request:
public static async Task<WorkflowResponse> PostRequestToIdentityAsync()
{
var url = "http://didentity/connect/token";
IdentityRequestDataVM identityRequestDataVM = new IdentityRequestDataVM();
identityRequestDataVM.username = "csm";
identityRequestDataVM.password = "MjAyMjox";
identityRequestDataVM.grant_type = "password";
identityRequestDataVM.scope = "m_gln m_msd";
string jsonString = JsonConvert.SerializeObject(identityRequestDataVM);
using (var httpClient = new HttpClient())
{
var request = new HttpRequestMessage
{
Method = HttpMethod.Post,
RequestUri = new Uri(url),
Content = new StringContent(jsonString),
Headers =
{
{"X-Login","override"}
}
};
var user = "gclt";
var password = "glsrt";
request.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/x-www-form-urlencoded"));
request.Headers.Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(System.Text.ASCIIEncoding.ASCII.GetBytes($"{user}:{password}")));
HttpResponseMessage message = await httpClient.SendAsync(request);
if (message.StatusCode == System.Net.HttpStatusCode.OK)
{
var contents = await message.Content.ReadAsStringAsync();
WorkflowResponse workflowResponse = JsonConvert.DeserializeObject<WorkflowResponse>(contents);
return workflowResponse;
}
else
{
throw new Exception(await message.Content.ReadAsStringAsync());
}
}
}
But, it returned 400 err code (Bad request), is there any mistake in the code snippet ?
It is working fine with postman.