Finished adding user support and ability to update specific novels or set your last read chapter

Treestar.Shared/Authentication/OIDC/AuthenticationExtension.cs

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+using System.Security.Claims;
+using Microsoft.AspNetCore.Authentication.Cookies;
+using Microsoft.AspNetCore.Authentication.OpenIdConnect;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.IdentityModel.Protocols.OpenIdConnect;
+using Microsoft.IdentityModel.Tokens;
+using WebNovelPortal.Authentication;
+
+namespace Treestar.Shared.Authentication.OIDC;
+
+public static class AuthenticationExtension
+{
+    public static void AddOIDCAuth(this IServiceCollection services, IConfiguration configuration)
+    {
+        var oidcConfig = configuration.GetRequiredSection(OpenIdConnectAuthenticationOptions.ConfigurationSection)
+            .Get<OpenIdConnectAuthenticationOptions>();
+        services.AddAuthentication(opt =>
+            {
+                opt.DefaultScheme = CookieAuthenticationDefaults.AuthenticationScheme;
+                opt.DefaultChallengeScheme = OpenIdConnectDefaults.AuthenticationScheme;
+            })
+            .AddCookie()
+            .AddOpenIdConnect(opt =>
+            {
+                opt.Authority = oidcConfig.Authority;
+                opt.ClientId = oidcConfig.ClientId;
+                opt.ClientSecret = oidcConfig.ClientSecret;
+
+                opt.ResponseType = OpenIdConnectResponseType.Code;
+                opt.GetClaimsFromUserInfoEndpoint = false;
+                opt.SaveTokens = true;
+                opt.UseTokenLifetime = true;
+                foreach (var scope in oidcConfig.Scopes.Split(" "))
+                {
+                    opt.Scope.Add(scope);
+                }
+
+                opt.TokenValidationParameters = new TokenValidationParameters
+                {
+                    NameClaimType = ClaimTypes.Name
+                };
+            });
+    }
+}