fix build errors

app/Admin/Login/page.tsx

@@ -1,3 +1,4 @@
+"use client";
 import { useState } from "react";
 
 import { login, signup } from "@/lib/server_functions/userAuth";

lib/server_functions/userAuth.ts

@@ -1,3 +1,4 @@
+"use server";
 import { cookies } from "next/headers";
 import { redirect } from "next/navigation";