c# - The remote server returned an error: (401) Unauthorized on Pay Fabric service -


i using below code token pay fabric service. facing error while doing so: "the remote server returned error: (401) unauthorized". have been doing net searching several hours didn't find helpful. 

        var url = "https://sandbox.payfabric.com/payment/api/token/create";         httpwebrequest httpwebrequest = webrequest.create(url) httpwebrequest;         httpwebrequest.contenttype = "application/json; charset=utf-8";         httpwebrequest.method = "get";         httpwebrequest.headers["authorization"] = "deviceid/password";         servicepointmanager.securityprotocol = (securityprotocoltype)3072;          //at line getting error.                    httpwebresponse httpwebresponse = httpwebrequest.getresponse() httpwebresponse;         //          stream responsestream = httpwebresponse.getresponsestream();         streamreader streamreader = new streamreader(responsestream);         string result = streamreader.readtoend();         streamreader.close();         responsestream.close();         httpwebrequest.abort();         httpwebresponse.close();          // parse json response         tokenresponse obj = jsonhelper.jsondeserialize<tokenresponse>(result);         return obj.token;

any appreciated.


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