Initializing roles in .NET 8 Blazor web app

I am trying to initialize roles for my Blazor app. This is my service that should create roles if they don't exist:

using Microsoft.AspNetCore.Identity;namespace FoodApp.Services{    public class RoleInitializerService : IHostedService    {        private readonly RoleManager<IdentityRole> _roleManager;        public RoleInitializerService(RoleManager<IdentityRole> roleManager)        {            _roleManager = roleManager;        }        public async Task StartAsync(CancellationToken cancellationToken)        {            string[] roles = { "Administrator", "User" };            foreach (var role in roles)            {                if (!await _roleManager.RoleExistsAsync(role))                {                    await _roleManager.CreateAsync(new IdentityRole(role));                }            }        }        public Task StopAsync(CancellationToken cancellationToken) => Task.CompletedTask;    }}

And this is service registration in program.cs

builder.Services.AddScoped<RoleInitializerService>();

I put a breakpoint inside the StartAsync method of my service, and the method was never executed.

What am I doing wrong? Is the problem laying in lifetime mismatch or what else?