Api route not working with multiple guard session login.

I am developing an eCommerce system with multiple authentication frontend and admin, for frontend I used the default web guard and for admin I used the admin guard. And also developing an API for the frontend. My problem is for frontend the default API routes are worked but for admin guard, its doesn't work I used different table for each guard users(web) and admin(admins). When I try any below routes through admin guard with Axios it occur "unauthenticated"

<?php

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Route;

/*
|--------------------------------------------------------------------------
| API Routes
|--------------------------------------------------------------------------
|
| Here is where you can register API routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| is assigned the "api" middleware group. Enjoy building your API!
|
*/

Route::post('v1/register', 'Auth\RegisterController@register');
Route::post('/login', 'Auth\LoginController@apiLogin');

Route::middleware('auth:api')->get('/user', function (Request $request) {
    return $request->user();
});

Route::middleware('json', 'auth:api')
    ->namespace('Api\V1')
    ->prefix('v1')
    ->name('api.')
    ->group(function () {
    		Route::get('brands/datatable', 'Brand\BrandController@datatable')->name('brands.datatable');
            Route::apiResource('brands', 'Brand\BrandController');
            Route::apiResource('categories', 'Category\CategoryController');
            Route::apiResource('products', 'Product\ProductController');
            Route::apiResource('attributes', 'Attribute\AttributeController');
});