Route::prefix('billing')->group(function () {
                Route::get('', [BillingController::class, 'index'])->name('user.billing');
                Route::post('subscribe', [BillingController::class, 'subscribe'])->name('user.billing.subscribe');
                Route::get('subscribe/success', [BillingController::class, 'success'])->name('user.billing.subscribe.success');
                Route::get('subscribe/cancelled', [BillingController::class, 'cancelled'])->name('user.billing.subscribe.cancelled');