role acces login in laravel

1 public function authenticate(Request $request)
2    {
3        $request->validate([
4            'email' => 'required|string|email',
5            'password' => 'required|string',
6        ]);
7
8        $credentials = $request->only('email', 'password');
9
10        if (Auth::attempt($credentials)) {
11           
12                return redirect('/');
13            }          
14            return redirect('login')->with('error', 'Opps! You have entered invalid credentials');   
15              
16    }