REST call in C# SharePoint application

Hi Friends,

I have a scenario like user(s) may or may not have an access to SharePoint library. but some of folders are shared with those.

Requirement: Need to show which folders they have an access.

Shared to User:

Result Shared URLs List: 

Please add:  using System.Web.Script.Serialization;

public void RestCall(SPWeb web)

        {

            try

            {               

                HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(web.Url + "/_api/web/lists/getbytitle('Test1')/items?$select=EncodedAbsUrl,Title,Category,ID&$orderby=ID asc&$filter=FSObjType eq 1");

                request.Method = "GET";

                request.Accept = "application/json;odata=verbose";

                request.ContentType = "application/json;odata=verbose";

                request.Credentials = new NetworkCredential("Spuser_Name", "Spuser_Password");

 // Note: working is in-progress of getting default login user credentials instead of passing user name and password

                WebResponse response = request.GetResponse();

                Data data = null;

                using (response)

                {

                    using (var reader = new StreamReader(response.GetResponseStream()))

                    {

                        JavaScriptSerializer serializer = new JavaScriptSerializer();

                        try

                        {

                            string jSON = reader.ReadToEnd();

                            data = serializer.Deserialize<Data>(jSON);

                        }

                        catch (Exception ex)

                        {

                           // throw error

                        }

                    }

                }

                string urls = "";

                List<getFolderDetails> AllAccessFolderUrls = new List<getFolderDetails>();

                foreach (getFolderDetails fol in data.d.results)

                {

                    urls = urls + fol.EncodedAbsUrl + " \n ";

                    AllAccessFolderUrls.Add(fol);

                }

                Label1.Text = urls;

            }

            catch (Exception ex)

            {  }

        }

        public class Data

        {

            public Results d { get; set; }

        }

        public class Results

        {

            public getFolderDetails[] results { get; set; }

        }

        public class getFolderDetails

        {

            public string id { get; set; }

            //public string Title { get; set; }

            public string EncodedAbsUrl { get; set; }

        }