throwing error as 'Class "Database\Factories\admin\UserFactory" not found'

after creating factory and seeder class for admin it shows me error as given below: Call to undefined method App\Models\admin\User::factory()

admin factory class

class AdminFactory extends Factory
{
    /**
     * Define the model's default state.
     *
     * @return array
     */
    public function definition()
    {
        return [
            'name' => 'Best Services',
            'email' => '[email protected]',
            'password' => bcrypt('password')
        ];
    }
}

seeder class :

class AdminSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        User::factory()->count(1)->create();
    }
}

databaseseeder class:

class DatabaseSeeder extends Seeder
{
    /**
     * Seed the application's database.
     *
     * @return void
     */
    public function run()
    {
        // \App\Models\User::factory(10)->create();
        $this->call([
            BlogCategorySeeder::class,
            BlogTagSeeder::class,
            AdminSeeder::class
        ]);
    }
}

user model:

class User extends Model
{
    use HasFactory;
    protected $table = 'users';
}