hcs/Hcs.WebApp/Services/UsersService.cs

using Hcs.WebApp.Data;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;

namespace Hcs.WebApp.Services
{
    public class UsersService(IDbContextFactory<AppIdentityDbContext> factory, UserManager<AppUser> userManager)
    {
        private readonly IDbContextFactory<AppIdentityDbContext> factory = factory;
        private readonly UserManager<AppUser> userManager = userManager;

        public async Task<IEnumerable<AppUserWithRole>> GetUsersWithRole()
        {
            using var context = factory.CreateDbContext();
            return await (from user in context.Users
                          join userRole in context.UserRoles on user.Id equals userRole.UserId
                          join role in context.Roles on userRole.RoleId equals role.Id
                          select new AppUserWithRole()
                          {
                              User = user,
                              Role = role
                          }).ToListAsync();
        }

        public async Task<IdentityResult> CreateUser(string userName, string roleName, string password)
        {
            var user = new AppUser()
            {
                UserName = userName,
                NormalizedUserName = userName.Normalize()
            };
            var result = await userManager.CreateAsync(user, password);
            if (result.Succeeded)
            {
                result = await userManager.AddToRolesAsync(user, [roleName]);
            }
            return result;
        }
    }
}