public function index()
    {
        if(Auth::check()){
            return redirect('/post');
        }else{
            return view('login_form');
        }
    }

    public function authenticate(Request $request)
    {
        $credentials = $request->validate([
            'email' => ['request', 'email'],
            'password' => ['required'],
        ]);

        if (Auth::attempt($credentials)){
            $request->session()->regenerate();
            return redirect()->intended('/post');
        }

        return redirect('/login')->withErrors([
            'email' => 'Email dan password tidak sesuai',
        ])->onlyInput('email');
    }