login to the server in unity c#

hi there,

i am trying to login to a server via unity c# script,

serverUrl "someapi" . which is of type "GET" on server.

if i open this links in any browser it gives a authentication popup, i put username and password and it's login and show the user details.

but when i try to do it via unity c# script, it gives me error code 401 >> unauthorised.

i have tried in different ways like >> www(); and unitywebrequest();

here is the code functions which i am using ;

public class UserClassForLogin { public string username = ""; public string password = "";

public string SetValuesForLogin() { UserClassForLogin temp = new UserClassForLogin();

     temp.username = username1;
     temp.password = username1;
     string userJsonfile = JsonUtility.ToJson(temp);
     return userJsonfile;

}

IEnumerator ServerRequestForLogin() {

 //     1st try  // not working error 401 >> unauthorised

 var newUserJson =  SetValuesForLogin();

 string tempUrl =someapi;
     tempUrl =  tempUrl.Replace(" ", "%20");
 UnityWebRequest request = UnityWebRequest.Put(tempUrl, newUserJson);
 byte[] rawData = System.Text.Encoding.ASCII.GetBytes(newUserJson.ToCharArray());
 request.uploadHandler = (UploadHandler)new UploadHandlerRaw(rawData);
 request.downloadHandler = (DownloadHandler)new DownloadHandlerBuffer();
 request.SetRequestHeader("Content-Type", "application/json");

 yield return request.Send();

 var can = true;
 while (can)
 {
     if (!request.isDone)
     {
         Debug.Log("downloading");
     }
     else if (request.isDone)
     {
         Debug.Log(request.responseCode);
         Debug.Log("pre planed : " + Username + " " + Password);
         can = false;
     }
 }

 // 2st try  // not working error 401 >> unauthorised

 string tempUrl = someapi;
     tempUrl =  tempUrl.Replace(" ", "%20");
 var form = new WWWForm();

 form.AddField("Username", Username);
 form.AddField("Password", Password);

 var headers = form.headers;
 var rawData = form.data;
 var secretKey = Username + ":" + Password;
 headers["Authorization"]="Basic " + System.Convert.ToBase64String(System.Text.Encoding.ASCII.GetBytes(secretKey));
 var api = new WWW(tempUrl,rawData,headers);

}

and i have tried some more code and nothing works for me.

some thing i am doing wrong, i don't know what.