سلام.
دلیل خطا چی میتونه باشه:
Illuminate\Database\Eloquent\Collection {#1334 ▼ // app\Http\Controllers\LoginController.php:36

items: []

escapeWhenCastingToString: false

}

   public function login(LoginRequest $request)
    {
        $data = $request->validated();
        $host = Admin::where('email', '=' , $data['email'])
                     ->where('password', '=' ,  $data['password'])
                     ->get();
        dd($host);
        return redirect()->route('panel.index');
    }