feat: implement basic oauth authentication

src/app/login/page.tsx

@@ -0,0 +1,20 @@
+import { auth } from '@/auth';
+import SignIn from '@/components/user/signin-button';
+import { SignOut } from '@/components/user/signout-button';
+
+export default async function Login() {
+  const session = await auth();
+  return (
+    <div>
+      <h1>Login</h1>
+      {!session?.user ? (
+        <SignIn></SignIn>
+      ) : (
+        <>
+          <h2>Hallo {session.user.name}</h2>
+          <SignOut></SignOut>
+        </>
+      )}
+    </div>
+  );
+}