public void OnGet()
        {
            ClientAppToken clientAppToken = ClientAppToken.Globals.ClientAppTokens.Find(cat => cat.CATTempSessionUID == catTempSessionUID);

            //clientAppToken.CATTempSessionUID = string.Empty;
            spotifyPlaylists = clientAppToken.CATSpotifyApi.SASpotifyPlaylists.Playlists;
        }
        public void OnGet()
        {
            if (string.IsNullOrWhiteSpace(code))
            {
                ClientAppToken token       = ClientAppToken.Globals.ClientAppTokens.Find(ut => ut.CATTempSessionUID == Request.Cookies["catTempSessionUID"]);
                string         scopes      = WebUtility.UrlEncode("user-read-playback-position user-read-email user-library-read user-top-read playlist-modify-public user-follow-read user-read-playback-state user-modify-playback-state user-read-private playlist-read-private user-library-modify playlist-read-collaborative playlist-modify-private user-follow-modify user-read-currently-playing user-read-recently-played");
                string         redirectUri = WebUtility.UrlEncode($"{ClientAppToken.Globals.BaseRedirectUri}/SpotifyAuth");
                Response.Redirect($"https://accounts.spotify.com/authorize?response_type=code&client_id={token.CATSpotifyApi.ApiInfo.ClientId}&scope={scopes}&redirect_uri={redirectUri}");
            }
            else if (!string.IsNullOrWhiteSpace(code))
            {
                ClientAppToken token      = ClientAppToken.Globals.ClientAppTokens.Find(ut => ut.CATTempSessionUID == Request.Cookies["catTempSessionUID"]);
                HttpClient     httpClient = new HttpClient {
                    BaseAddress = new Uri(ClientAppToken.Globals.BaseRedirectUri)
                };
                string credentials = string.Format("{0}:{1}", token.CATSpotifyApi.ApiInfo.ClientId, token.CATSpotifyApi.ApiInfo.ClientSecret);

                httpClient.DefaultRequestHeaders.Accept.Clear();
                httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

                httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(Encoding.UTF8.GetBytes(credentials)));

                List <KeyValuePair <string, string> > requestData = new List <KeyValuePair <string, string> >();
                requestData.Add(new KeyValuePair <string, string>("grant_type", "authorization_code"));
                requestData.Add(new KeyValuePair <string, string>("code", code));
                requestData.Add(new KeyValuePair <string, string>("redirect_uri", $"{ClientAppToken.Globals.BaseRedirectUri}/SpotifyAuth"));

                FormUrlEncodedContent requestBody = new FormUrlEncodedContent(requestData);

                HttpResponseMessage request = httpClient.PostAsync("https://accounts.spotify.com/api/token", requestBody).Result;
                string response             = request.Content.ReadAsStringAsync().Result;
                token.CATSpotifyApi.ApiAccessToken = JsonConvert.DeserializeObject <ClientAppToken.ApiAccessToken>(response);
                msg = "Successfully logged into Spotify.";
                Response.Cookies.Delete("catTempSessionUID");
                // TESTING
                // token.CATTempSessionUID = string.Empty
                Response.Redirect($"/TestShowSpotifyToken?catTempSessionUID={token.CATTempSessionUID}");
            }
            else
            {
                msg = "Failed to login to Spotify.";
            }
        }