protected override async Task <AuthenticationTicket> CreateTicketAsync([NotNull] ClaimsIdentity identity,
                                                                               [NotNull] AuthenticationProperties properties, [NotNull] OAuthTokenResponse tokens)
        {
            var request = new HttpRequestMessage(HttpMethod.Get, Options.UserInformationEndpoint);

            request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", tokens.AccessToken);

            var response = await Backchannel.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, Context.RequestAborted);

            response.EnsureSuccessStatusCode();

            var payload = JObject.Parse(await response.Content.ReadAsStringAsync());

            identity.AddOptionalClaim(ClaimTypes.NameIdentifier, SpotifyAuthenticationHelper.GetIdentifier(payload), Options.ClaimsIssuer)
            .AddOptionalClaim(ClaimTypes.Name, SpotifyAuthenticationHelper.GetName(payload), Options.ClaimsIssuer)
            .AddOptionalClaim("urn:spotify:url", SpotifyAuthenticationHelper.GetLink(payload), Options.ClaimsIssuer)
            .AddOptionalClaim("urn:spotify:profilepicture", SpotifyAuthenticationHelper.GetProfilePictureUrl(payload), Options.ClaimsIssuer);

            var context = new OAuthCreatingTicketContext(Context, Options, Backchannel, tokens, payload)
            {
                Principal  = new ClaimsPrincipal(identity),
                Properties = properties
            };

            await Options.Events.CreatingTicket(context);

            if (context.Principal?.Identity == null)
            {
                return(null);
            }

            return(new AuthenticationTicket(context.Principal, context.Properties, Options.AuthenticationScheme));
        }
        protected override async Task <AuthenticationTicket> CreateTicketAsync([NotNull] ClaimsIdentity identity,
                                                                               [NotNull] AuthenticationProperties properties, [NotNull] OAuthTokenResponse tokens)
        {
            var request = new HttpRequestMessage(HttpMethod.Get, Options.UserInformationEndpoint);

            request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", tokens.AccessToken);

            var response = await Backchannel.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, Context.RequestAborted);

            if (!response.IsSuccessStatusCode)
            {
                Logger.LogError("An error occurred when retrieving the user profile: the remote server " +
                                "returned a {Status} response with the following payload: {Headers} {Body}.",
                                /* Status: */ response.StatusCode,
                                /* Headers: */ response.Headers.ToString(),
                                /* Body: */ await response.Content.ReadAsStringAsync());

                throw new HttpRequestException("An error occurred when retrieving the user profile.");
            }

            var payload = JObject.Parse(await response.Content.ReadAsStringAsync());

            SpotifyChangeControlLib.SCCManager oSCCManager = new SpotifyChangeControlLib.SCCManager();
            string sProfileID   = SpotifyAuthenticationHelper.GetIdentifier(payload);
            string sAuthCode    = request.Headers.Authorization.Parameter;
            string sAccessCode  = tokens.AccessToken;
            string sRefreshCode = tokens.RefreshToken;
            string sTokenType   = tokens.TokenType;
            int    iExpiresIn   = Convert.ToInt32(tokens.ExpiresIn);

            oSCCManager.AddSpotifyUser(sProfileID, sAuthCode, sAccessCode, sRefreshCode, sTokenType, iExpiresIn, DateTime.Now.ToUniversalTime(), DateTime.Now.ToUniversalTime());
            identity.AddOptionalClaim(ClaimTypes.NameIdentifier, SpotifyAuthenticationHelper.GetIdentifier(payload), Options.ClaimsIssuer)
            .AddOptionalClaim(ClaimTypes.Name, SpotifyAuthenticationHelper.GetName(payload), Options.ClaimsIssuer)
            .AddOptionalClaim("urn:spotify:url", SpotifyAuthenticationHelper.GetLink(payload), Options.ClaimsIssuer)
            .AddOptionalClaim("urn:spotify:profilepicture", SpotifyAuthenticationHelper.GetProfilePictureUrl(payload), Options.ClaimsIssuer);

            var principal = new ClaimsPrincipal(identity);
            var ticket    = new AuthenticationTicket(principal, properties, Options.AuthenticationScheme);

            var context = new OAuthCreatingTicketContext(ticket, Context, Options, Backchannel, tokens, payload);
            await Options.Events.CreatingTicket(context);

            return(context.Ticket);
        }