nextauth working.

src/app/api/auth/[...nextauth]/route.ts

@@ -0,0 +1,70 @@
+import NextAuth from 'next-auth';
+import GoogleProvider from 'next-auth/providers/google';
+import CredentialsProvider from 'next-auth/providers/credentials';
+
+// In-memory user store (for demo only)
+type User = { email: string; password: string };
+declare global {
+  // eslint-disable-next-line no-var
+  var _users: User[] | undefined;
+}
+const users: User[] = global._users || (global._users = []);
+
+const handler = NextAuth({
+  providers: [
+    GoogleProvider({
+      clientId: process.env.GOOGLE_CLIENT_ID ?? '',
+      clientSecret: process.env.GOOGLE_CLIENT_SECRET ?? '',
+    }),
+    CredentialsProvider({
+      name: 'Credentials',
+      credentials: {
+        email: { label: "Email", type: "email" },
+        password: { label: "Password", type: "password" }
+      },
+      async authorize(credentials) {
+        if (!credentials?.email || !credentials?.password) return null;
+        // Check in-memory user store
+        const user = users.find(
+          (u) => u.email === credentials.email && u.password === credentials.password
+        );
+        if (user) {
+          return {
+            id: user.email,
+            email: user.email,
+            name: user.email.split('@')[0],
+          };
+        }
+        // For demo, still allow the test user
+        if (credentials.email === "test@example.com" && credentials.password === "password") {
+          return {
+            id: "1",
+            email: credentials.email,
+            name: "Test User",
+          };
+        }
+        return null;
+      }
+    }),
+  ],
+  pages: {
+    signIn: '/account/login',
+    // signUp: '/account/register', // Uncomment when register page is ready
+    // error: '/account/error', // Uncomment when error page is ready
+  },
+  callbacks: {
+    async session({ session, token }) {
+      // Add any additional user data to the session here
+      return session;
+    },
+    async jwt({ token, user }) {
+      // Add any additional user data to the JWT here
+      if (user) {
+        token.id = user.id;
+      }
+      return token;
+    },
+  },
+})
+
+export { handler as GET, handler as POST }