UserController.php

<?php

namespace App\Http\Controllers;

use App\Imports\UsersImport;
use App\Models\User;
use Illuminate\Http\RedirectResponse;
use Maatwebsite\Excel\Facades\Excel;

class UserController extends Controller
{
    /**
     * @return RedirectResponse
     * @throws ValidationException
     */
    public function import(): RedirectResponse
    {
        $this->validate(request(), [
            'file' => 'required|mimetypes::'.
                'application/vnd.ms-office,'.
                'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet,'.
                'application/vnd.ms-excel',
        ]);

        try {
            set_time_limit(0);
            DB::beginTransaction();
            Excel::import(new UsersImport(), request("file"));
            DB::commit();
            return back()
                ->with('notification', ['type' => 'success', 'title' => 'Usuarios importados']);
        } catch (\Exception $exception) {
            DB::rollBack();
            return back()
                ->with('notification', ['type' => 'danger', 'title' => 'Error importando usuarios']);
        }
    }
}