BoxKite.Twitter.WinUWPPlatformAdaptor.AuthWithBroker C# (CSharp) Метод

        public async Task<string> AuthWithBroker(string oauthuri, string callbackuri)
        {
            var StartUri = new Uri(oauthuri);
            var EndUri = new Uri(callbackuri);
            var WebAuthenticationResult = await WebAuthenticationBroker.AuthenticateAsync(
                                                        WebAuthenticationOptions.None,
                                                        StartUri,
                                                        EndUri);
            return WebAuthenticationResult.ResponseStatus == WebAuthenticationStatus.Success ? WebAuthenticationResult.ResponseData.ToString() : null;
        }