Dynamic prefix routing in laravel - laravel

Question

I'm currently facing an issue with the prefix routing. I'm not sure if I'm doing it right for the routing, can you help me?
Here is the context: My website has 2 front and 1 back. All views will kind of be similar, just some section will disappear.
Urls should be like this:
localhost/admin
localhost/front1
localhost/front2
When I tried to go to localhost/front1/login, I have this error
Missing required parameters for [Route: login] [URI: {brand}/login]. (View: F:\StockageUnit2\Developpement\projets\billetterie\resources\views\auth\login.blade
What am I doing wrong ?
And how do I differentiate which route I'm using on my template for the href ?
How I am supposed to redirect depending on the prefix as href is determined by the route name?
I read the documentation and found no clues about it...
app\Providers\RouteServiceProvider.php
public function boot()
{
parent::boot();
Route::bind('brand', function ($value) {
return Brand::where('slug', $value)->first() ?? abort(404);
});
}
routes/web.php
use Illuminate\Support\Facades\Auth;
use \App\Brand;
Route::get('/' , 'HomeController#index')->name('main');
/*Back*/
Route::group([
'prefix' => 'admin'
], function () {
Route::get('/' , 'AdminController#index')->name('admin.home');
AuthRoutes();
});
/*Front*/
Route::group([
'prefix' => '{brand}'
], function () {
Route::get('/' , 'BrandsLandingController#index')->name('main_landing');
AuthRoutes();
});
function AuthRoutes()
{
Route::get('login', 'Auth\LoginController#showLoginForm')->name('login');
Route::post('login', 'Auth\LoginController#login');
Route::post('logout', 'Auth\LoginController#logout')->name('logout');
Route::get('register', 'Auth\RegisterController#showRegistrationForm')->name('register');
Route::post('register', 'Auth\RegisterController#register');
Route::get('password/reset', 'Auth\ForgotPasswordController#showLinkRequestForm')->name('password.request');
Route::post('password/email', 'Auth\ForgotPasswordController#sendResetLinkEmail')->name('password.email');
Route::get('password/reset/{token}', 'Auth\ResetPasswordController#showResetForm')->name('password.reset');
Route::post('password/reset', 'Auth\ResetPasswordController#reset')->name('password.update');
Route::get('email/verify', 'Auth\VerificationController#show')->name('verification.notice');
Route::get('email/verify/{id}', 'Auth\VerificationController#verify')->name('verification.verify');
Route::get('email/resend', 'Auth\VerificationController#resend')->name('verification.resend');
}
route:list
| | GET|HEAD | / | main | App\Http\Controllers\HomeController#index |
| | GET|HEAD | admin | admin.home | App\Http\Controllers\AdminController#index | |
| | GET|HEAD | admin/email/resend | verification.resend | App\Http\Controllers\Auth\VerificationController#resend | web,auth,throttle:
| | GET|HEAD | admin/email/verify | verification.notice | App\Http\Controllers\Auth\VerificationController#show | web,|
| | GET|HEAD | admin/email/verify/{id} | verification.verify | App\Http\Controllers\Auth\VerificationController#verify | web,auth,signed,e:6,1 |
| | GET|HEAD | admin/login | login | App\Http\Controllers\Auth\LoginController#showLoginForm | web,|
| | POST | admin/login | | App\Http\Controllers\Auth\LoginController#login | web,|
| | POST | admin/logout | logout | App\Http\Controllers\Auth\LoginController#logout | |
| | POST | admin/password/email | password.email | App\Http\Controllers\Auth\ForgotPasswordController#sendResetLinkEmail | web,|
| | GET|HEAD | admin/password/reset | password.request | App\Http\Controllers\Auth\ForgotPasswordController#showLinkRequestForm | web,|
| | POST | admin/password/reset | password.update | App\Http\Controllers\Auth\ResetPasswordController#reset | web,|
| | GET|HEAD | admin/password/reset/{token} | password.reset | App\Http\Controllers\Auth\ResetPasswordController#showResetForm | web,|
| | GET|HEAD | admin/register | register | App\Http\Controllers\Auth\RegisterController#showRegistrationForm | web,|
| | POST | admin/register | | App\Http\Controllers\Auth\RegisterController#register | web,|
| | GET|HEAD | api/user | | Closure | api,|
| | GET|HEAD | {brand} | main_landing | App\Http\Controllers\BrandsLandingController#index | |
| | GET|HEAD | {brand}/email/resend | verification.resend | App\Http\Controllers\Auth\VerificationController#resend | web,auth,throttle:
| | GET|HEAD | {brand}/email/verify | verification.notice | App\Http\Controllers\Auth\VerificationController#show | web,auth | | GET|HEAD | {brand}/email/verify/{id} | verification.verify | App\Http\Controllers\Auth\VerificationController#verify | web,auth,signed,throttl| | GET|HEAD | {brand}/login | login | App\Http\Controllers\Auth\LoginController#showLoginForm | web,guest | | POST | {brand}/login | | App\Http\Controllers\Auth\LoginController#login | web,guest | | POST | {brand}/logout | logout | App\Http\Controllers\Auth\LoginController#logout | web | | POST | {brand}/password/email | password.email | App\Http\Controllers\Auth\ForgotPasswordController#sendResetLinkEmail | web,guest | | GET|HEAD | {brand}/password/reset | password.request | App\Http\Controllers\Auth\ForgotPasswordController#showLinkRequestForm | web,guest | | POST | {brand}/password/reset | password.update | App\Http\Controllers\Auth\ResetPasswordController#reset | web,guest | | GET|HEAD | {brand}/password/reset/{token} | password.reset | App\Http\Controllers\Auth\ResetPasswordController#showResetForm | web,guest | | GET|HEAD | {brand}/register | register | App\Http\Controllers\Auth\RegisterController#showRegistrationForm | web,guest | | POST | {brand}/register | | App\Http\Controllers\Auth\RegisterController#register | web,guest
Having no errors on the different routes.
Can differentiate the routes name depending on the prefix like front1.login, front2.login, admin.login ...
Thanks in advance