protected override async Task <AuthenticationTicket> GetUserInformationAsync(AuthenticationProperties properties, TokenResponse tokens)
        {
            // Get the Google user
            HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, Options.UserInformationEndpoint);

            request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", tokens.AccessToken);
            HttpResponseMessage graphResponse = await Backchannel.SendAsync(request, Context.RequestAborted);

            graphResponse.EnsureSuccessStatusCode();
            var text = await graphResponse.Content.ReadAsStringAsync();

            JObject user = JObject.Parse(text);

            var context  = new GoogleAuthenticatedContext(Context, Options, user, tokens);
            var identity = new ClaimsIdentity(
                Options.AuthenticationScheme,
                ClaimsIdentity.DefaultNameClaimType,
                ClaimsIdentity.DefaultRoleClaimType);

            if (!string.IsNullOrEmpty(context.Id))
            {
                identity.AddClaim(new Claim(ClaimTypes.NameIdentifier, context.Id,
                                            ClaimValueTypes.String, Options.AuthenticationScheme));
            }
            if (!string.IsNullOrEmpty(context.GivenName))
            {
                identity.AddClaim(new Claim(ClaimTypes.GivenName, context.GivenName,
                                            ClaimValueTypes.String, Options.AuthenticationScheme));
            }
            if (!string.IsNullOrEmpty(context.FamilyName))
            {
                identity.AddClaim(new Claim(ClaimTypes.Surname, context.FamilyName,
                                            ClaimValueTypes.String, Options.AuthenticationScheme));
            }
            if (!string.IsNullOrEmpty(context.Name))
            {
                identity.AddClaim(new Claim(ClaimTypes.Name, context.Name, ClaimValueTypes.String,
                                            Options.AuthenticationScheme));
            }
            if (!string.IsNullOrEmpty(context.Email))
            {
                identity.AddClaim(new Claim(ClaimTypes.Email, context.Email, ClaimValueTypes.String,
                                            Options.AuthenticationScheme));
            }
            if (!string.IsNullOrEmpty(context.Profile))
            {
                identity.AddClaim(new Claim("urn:google:profile", context.Profile, ClaimValueTypes.String,
                                            Options.AuthenticationScheme));
            }
            context.Properties = properties;
            context.Principal  = new ClaimsPrincipal(identity);

            await Options.Notifications.Authenticated(context);

            return(new AuthenticationTicket(context.Principal, context.Properties, context.Options.AuthenticationScheme));
        }
        internal static async Task OnAuthenticated(GoogleAuthenticatedContext context)
        {
            if (context.Principal != null)
            {
                Helpers.ThrowIfConditionFailed(() => context.AccessToken == "ValidAccessToken", "Access token is not valid");
                Helpers.ThrowIfConditionFailed(() => context.RefreshToken == "ValidRefreshToken", "Refresh token is not valid");
                Helpers.ThrowIfConditionFailed(() => context.Email == "*****@*****.**", "Email is not valid");
                Helpers.ThrowIfConditionFailed(() => context.Id == "106790274378320830963", "Id is not valid");
                Helpers.ThrowIfConditionFailed(() => context.FamilyName == "AspnetvnextTest", "FamilyName is not valid");
                Helpers.ThrowIfConditionFailed(() => context.Name == "AspnetvnextTest AspnetvnextTest", "Name is not valid");
                Helpers.ThrowIfConditionFailed(() => context.ExpiresIn.Value == TimeSpan.FromSeconds(1200), "ExpiresIn is not valid");
                Helpers.ThrowIfConditionFailed(() => context.User != null, "User object is not valid");
                context.Principal.Identities.First().AddClaim(new Claim("ManageStore", "false"));
            }

            await Task.FromResult(0);
        }
 /// <summary>
 /// Invoked whenever Google succesfully authenticates a user.
 /// </summary>
 /// <param name="context">Contains information about the login session as well as the user <see cref="System.Security.Claims.ClaimsIdentity"/>.</param>
 /// <returns>A <see cref="Task"/> representing the completed operation.</returns>
 public virtual Task Authenticated(GoogleAuthenticatedContext context)
 {
     return OnAuthenticated(context);
 }
 /// <summary>
 /// Invoked whenever Google succesfully authenticates a user.
 /// </summary>
 /// <param name="context">Contains information about the login session as well as the user <see cref="System.Security.Claims.ClaimsIdentity"/>.</param>
 /// <returns>A <see cref="Task"/> representing the completed operation.</returns>
 public virtual Task Authenticated(GoogleAuthenticatedContext context)
 {
     return(OnAuthenticated(context));
 }