Add auth

src/components/auth/LogoutButton.tsx

@@ -0,0 +1,20 @@
+"use client";
+
+import { Button } from "@/components/ui/button";
+import { useRouter } from "next/navigation";
+
+export function LogoutButton() {
+  const router = useRouter();
+
+  async function logout() {
+    await fetch("/api/auth/sign-out", { method: "POST" });
+    router.replace("/login");
+    router.refresh();
+  }
+
+  return (
+    <Button variant="secondary" onClick={logout}>
+      Sign out
+    </Button>
+  );
+}