diff --git a/src/app/(oauth)/q58/callback/page.tsx b/src/app/(oauth)/q58/callback/page.tsx
index 6d9d6dd..3059649 100644
--- a/src/app/(oauth)/q58/callback/page.tsx
+++ b/src/app/(oauth)/q58/callback/page.tsx
@@ -1,22 +1,22 @@
 import { Suspense } from "react";
 import { redirect } from "next/navigation";
 
+import { discourseCallbackVerify } from "@/lib/discourse/verify";
 import { findAuthorization } from "@/lib/dto/authorization";
 import { getClientByClientId } from "@/lib/dto/client";
 import { getAuthorizeUrl } from "@/lib/oauth/authorize-url";
-import { q58CallbackVerify } from "@/lib/q58/verify";
 import { AuthorizationCard } from "@/components/auth/authorization-card";
 
-export interface Q58CallbackParams extends Record<string, string> {
+export interface DiscourseCallbackParams extends Record<string, string> {
   sig: string;
   sso: string;
   oauth: string;
 }
 
-export default async function Q58CallbackPage({
+export default async function DiscourseCallbackPage({
   searchParams,
 }: {
-  searchParams: Q58CallbackParams;
+  searchParams: DiscourseCallbackParams;
 }) {
   const oauthParams = new URLSearchParams(atob(searchParams.oauth));
   // check client info
@@ -28,7 +28,10 @@ export default async function Q58CallbackPage({
   }
 
   // verify discourse callback
-  const user = await q58CallbackVerify(searchParams.sso, searchParams.sig);
+  const user = await discourseCallbackVerify(
+    searchParams.sso,
+    searchParams.sig,
+  );
 
   // check authorization
   const authorization = await findAuthorization(user.id, client.id);
diff --git a/src/auth.config.ts b/src/auth.config.ts
index 35cbbd4..b93490c 100644
--- a/src/auth.config.ts
+++ b/src/auth.config.ts
@@ -1,7 +1,7 @@
 import type { NextAuthConfig } from "next-auth";
 import Credentials from "next-auth/providers/credentials";
 
-import { q58CallbackVerify } from "./lib/q58/verify";
+import { discourseCallbackVerify } from "./lib/discourse/verify";
 
 // Notice this is only an object, not a full Auth.js instance
 export default {
@@ -14,7 +14,7 @@ export default {
       authorize: async (credentials) => {
         const sso = credentials.sso as string;
         const sig = credentials.sig as string;
-        const user = await q58CallbackVerify(sso, sig);
+        const user = await discourseCallbackVerify(sso, sig);
         return user;
       },
     }),
diff --git a/src/lib/discourse/verify.ts b/src/lib/discourse/verify.ts
index 607bcad..8c36d1b 100644
--- a/src/lib/discourse/verify.ts
+++ b/src/lib/discourse/verify.ts
@@ -8,11 +8,11 @@ import hmacSHA256 from "crypto-js/hmac-sha256";
 import { AUTH_NONCE } from "@/lib/constants";
 import { createUser, getUserById, updateUser } from "@/lib/dto/user";
 
-const Q58_SECRET = process.env.DISCOURSE_SECRET as string;
+const DISCOUSE_SECRET = process.env.DISCOURSE_SECRET as string;
 
-export async function q58CallbackVerify(sso: string, sig: string) {
+export async function discourseCallbackVerify(sso: string, sig: string) {
   // 校验数据正确性
-  if (hmacSHA256(sso, Q58_SECRET).toString(Hex) != sig) {
+  if (hmacSHA256(sso, DISCOUSE_SECRET).toString(Hex) != sig) {
     throw new Error("Request params is invalid  (code: -1001).");
   }
   // 校验 nonce
diff --git a/src/lib/q58/verify.ts b/src/lib/q58/verify.ts
deleted file mode 100644
index 607bcad..0000000
--- a/src/lib/q58/verify.ts
+++ /dev/null
@@ -1,74 +0,0 @@
-import "server-only";
-
-import { cookies } from "next/headers";
-import { UserRole } from "@prisma/client";
-import Hex from "crypto-js/enc-hex";
-import hmacSHA256 from "crypto-js/hmac-sha256";
-
-import { AUTH_NONCE } from "@/lib/constants";
-import { createUser, getUserById, updateUser } from "@/lib/dto/user";
-
-const Q58_SECRET = process.env.DISCOURSE_SECRET as string;
-
-export async function q58CallbackVerify(sso: string, sig: string) {
-  // 校验数据正确性
-  if (hmacSHA256(sso, Q58_SECRET).toString(Hex) != sig) {
-    throw new Error("Request params is invalid  (code: -1001).");
-  }
-  // 校验 nonce
-  const cookieStore = cookies();
-  let searchParams = new URLSearchParams(atob(sso as string));
-  const nonce = searchParams.get("nonce");
-  if (!cookieStore.has(AUTH_NONCE) || !nonce) {
-    throw new Error("Request params is invalid (code: -1002).");
-  }
-  if (cookieStore.get(AUTH_NONCE)?.value != nonce) {
-    throw new Error("Request params is invalid (code: -1003).");
-  }
-  // cookieStore.delete(AUTH_NONCE);
-
-  const id = searchParams.get("external_id");
-  const email = searchParams.get("email");
-  const username = searchParams.get("username");
-  const name = searchParams.get("name");
-  const avatarUrl = searchParams.get("avatar_url");
-  const isAdmin = searchParams.get("admin") == "true";
-  const moderator = searchParams.get("moderator") == "true";
-  const groups = searchParams.get("groups")?.split(",");
-  if (!id || !email || !username) {
-    throw new Error("User not found.");
-  }
-
-  // 查数据库是否有人
-  let dbUser = await getUserById(id);
-  if (dbUser) {
-    // 更新
-    dbUser = await updateUser(id, {
-      username,
-      email,
-      name,
-      avatarUrl,
-      role: isAdmin ? UserRole.ADMIN : UserRole.USER,
-      moderator,
-      groups,
-    });
-  } else {
-    // 创建
-    dbUser = await createUser({
-      id,
-      username,
-      email,
-      name,
-      avatarUrl,
-      role: isAdmin ? UserRole.ADMIN : UserRole.USER,
-      moderator,
-      groups,
-    });
-  }
-
-  if (!dbUser) {
-    throw new Error("User not create success.");
-  }
-
-  return dbUser;
-}
diff --git a/src/lib/session.ts b/src/lib/session.ts
index d61315c..eba6f94 100644
--- a/src/lib/session.ts
+++ b/src/lib/session.ts
@@ -1,7 +1,12 @@
+import "server-only";
+
 import { cache } from "react";
 import { auth } from "@/auth";
 
 export const getCurrentUser = cache(async () => {
   const session = await auth();
-  return session?.user;
+  if (!session?.user) {
+    return undefined;
+  }
+  return session.user;
 });