Screening a case Results 401 unauthorised

Hi @Irfan.Khan

I am using the datatosign as

var dataToSign = "(request-target): post " + GlobalProperties.GateWayUrl + "cases/" + CaseSystemId + "/screeningRequest\n" +"host: " + GlobalProperties.GatewayHost + "\n" +"date: " + dateValue.ToString("R"); accordingly in postman application
whereas the quthorosation header is

var authorisation = "Signature keyId=\"" + GlobalProperties.APIKey + "\",algorithm=\"hmac-sha256\",headers=\"(request-target) host date\",signature=\"" + hmac + "\"";

kindly help me in this.as I am following the headers in postman application.

@Irfan.Khan
here I ama providing the code I have used in my application which was failing.

Request and Response Headers for screening a case

var dataToSign = "(request-target): post " + GlobalProperties.GateWayUrl + "cases/" + CaseSystemId + "/screeningRequest\n" +
"host: " + GlobalProperties.GatewayHost + "\n" +
"date: " + dateValue.ToString("R");
DateTime dateValue = DateTime.UtcNow;
string authorisation = "";
string hmac = generateAuthHeader(datatoSign, GlobalProperties.APISecret);
HttpWebRequest WebReq = (HttpWebRequest)WebRequest.Create(reqEndPoint);
WebRequest.DefaultWebProxy.Credentials = CredentialCache.DefaultNetworkCredentials;
using (WebReq as IDisposable)
{
WebReq.Method = "POST";
WebReq.Headers.Add("Cache-Control", "no-cache");
WebReq.Date = dateValue;
authorisation = "Signature keyId=\"" + GlobalProperties.APIKey + "\",algorithm=\"hmac-sha256\",headers=\"(request-target) host date\",signature=\"" + hmac + "\"";
WebReq.Headers.Add("Authorization", authorisation);
}

try
{
using (HttpWebResponse response = (HttpWebResponse)WebReq.GetResponse())
{
using (Stream answer = response.GetResponseStream())
{
StreamReader _Answer = new StreamReader(answer);
dynamic responseData = Newtonsoft.Json.JsonConvert.DeserializeObject(_Answer.ReadToEnd());
answer.Dispose(); answer.Close();
response.Dispose(); response.Close();
return responseData;

}
}
}
catch (WebException e)
{
FileHelper.Logger(FileHelper.LogType.ERROR, e.Message, "WCO_");
FileHelper.Logger(FileHelper.LogType.ERROR, e.StackTrace, "WCO_");
if (e.Status == WebExceptionStatus.Timeout)
{
// Handle timeout exception
}
else
{
}
}