Requesting a API token with both basic authentication and application/x-www-form-urlencoded - api

Question

I'm trying to create an application using MS Visual Studio in either vb.net or C# to receive a token for a web api that has both basic authentication and application/x-www-form-urlencoded. When I send the request from Postman the requested works. Please see Postman screen shots below. When is use the below code I receive and message "Request failed with status code NotFound" back and the request fails. Can any point in the the right direction to resolve this.
Thank you
Postman
postman body
`private void button1_Click(object sender, EventArgs e)
{
Uri baseurl = new Uri("https://api address/token");
RestClient client = new RestClient(baseurl);
//client.Timeout = -1;
RestRequest request = new RestRequest("post", Method.Post);
request.AddHeader("Authorization", "Basic M2U4Y");
request.AddHeader("Content-Type", "application/x-www-form-urlencoded");
request.AddParameter("grant_type", "client_credentials",true);
request.AddParameter("scope", "https://?????????",true);
RestResponse response = client.Execute(request);
if (response.Content == "")
{
textBox1.Text = response.ErrorException.Message ;
}
else
{
textBox1.Text = response.Content;
}
}
`

Answer 1

I solved the problem. With the below code.
Uri baseurl = new Uri("https://api address/token");
RestClient client = new RestClient(baseurl);
RestRequest request = new RestRequest(baseurl, Method.Post);
request.AddHeader("Authorization", "Basic M2U4Y");
request.AddHeader("Content-Type", "application/x-www-form-urlencoded");
request.AddParameter("application/x-www-form-urlencoded", "grant_type=client_credentials&scope=https://FED0C291",arameterType.RequestBody);RestResponse response = client.Execute(request);
if (response.Content == "")
{
textBox1.Text = response.ErrorException.Message ;
}
else
{
textBox1.Text = response.Content;
}