Create Episerver admin user by code

After installing an Alloy site I forgot the username and password to login to Episerver and creating a local user and adding it to the Administrators group did not work for me. Maybe someone can tell me how that should work and be done!?

The old fashion way to create an Episerver user is described here:

https://world.episerver.com/blogs/Henrik-Fransas/Dates/2015/10/how-to-create-a-admin-user-through-code/

But that does not work in CMS 10 or 11 so I decided to write som code to create a user in CMS 11 and ended up with this:

[InitializableModule]
[ModuleDependency(typeof(EPiServer.Web.InitializationModule))]
public class EpiserverInitialization : IInitializableModule
{
    private static readonly string[] _roles = { "WebAdmins", "WebEditors" };        

    public void Initialize(InitializationEngine context)
    {
        using (UserStore<ApplicationUser> store = new UserStore<ApplicationUser>(new ApplicationDbContext<ApplicationUser>("EPiServerDB")))
        {
            //If there's already a user, then we don't need a seed
            if (!store.Users.Any(x => x.UserName == "sysadmin"))
            {
                var createdUser = CreateUser(store, "sysadmin", "p@ssword", "sysadmin@mysite.com");
                AddUserToRoles(store, createdUser, _roles);
                store.UpdateAsync(createdUser).GetAwaiter().GetResult();
            }                
        }
    }

    private ApplicationUser CreateUser(UserStore<ApplicationUser> store, string username, string password, string email)
    {
        //We know that this Password hasher is used as it's configured
        IPasswordHasher hasher = new PasswordHasher();
        string passwordHash = hasher.HashPassword(password);

        ApplicationUser applicationUser = new ApplicationUser
        {
            Email = email,
            EmailConfirmed = true,
            LockoutEnabled = true,
            IsApproved = true,
            UserName = username,
            PasswordHash = passwordHash,
            SecurityStamp = Guid.NewGuid().ToString()
        };

        store.CreateAsync(applicationUser).GetAwaiter().GetResult();

        //Get the user associated with our username
        ApplicationUser createdUser = store.FindByNameAsync(username).GetAwaiter().GetResult();
        return createdUser;
    }

    private void AddUserToRoles(UserStore<ApplicationUser> store, ApplicationUser user, string[] roles)
    {
        IUserRoleStore<ApplicationUser, string> userRoleStore = store;
        using (var roleStore = new RoleStore<IdentityRole>(new ApplicationDbContext<ApplicationUser>("EPiServerDB")))
        {
            IList<string> userRoles = userRoleStore.GetRolesAsync(user).GetAwaiter().GetResult();
            foreach (string roleName in roles)
            {
                if (roleStore.FindByNameAsync(roleName).GetAwaiter().GetResult() == null)
                {
                    roleStore.CreateAsync(new IdentityRole { Name = roleName }).GetAwaiter().GetResult();
                }
                if (!userRoles.Contains(roleName))
                    userRoleStore.AddToRoleAsync(user, roleName).GetAwaiter().GetResult();
            }
        }
    }

    public void Uninitialize(InitializationEngine context)
    {
    }

    public void Preload(string[] parameters)
    {
    }
}

After this code is run I can login with the created sysadmin user.