EF core 3.1: include userroles in user

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EF-Core

Hi. I am trying for a couple of days now and just cannot make it work. It seems like pretty obvious task, however.

public class UserRole : IdentityUserRole<string>
{
    public virtual User User { get; set; }
    public virtual Role Role { get; set; }
}

public class User : IdentityUser
{
    public virtual ICollection<UserRole> UserRoles { get; set; }

}

public class Role : IdentityRole
{
    public virtual ICollection<UserRole> UserRoles { get; set; }
}

public class IdentityContext : IdentityDbContext<User, Role, string>
{
    public IdentityContext(DbContextOptions<IdentityContext> options) : base(options)
    {
    }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder);

        modelBuilder.Entity<User>()
            .HasMany(e => e.UserRoles)
            .WithOne()
            .HasForeignKey(e => e.UserId)
            .IsRequired()
            .OnDelete(DeleteBehavior.NoAction);
}

services
    .AddIdentity<User, Role>(options =>
    {
        // Minimal password requirements
        options.Password.RequireDigit = false;
        options.Password.RequiredLength = 1;
        options.Password.RequireUppercase = false;
        options.Password.RequiredUniqueChars = 0;
        options.Password.RequireNonAlphanumeric = false;
        options.Password.RequireLowercase = false;
        options.User.RequireUniqueEmail = true;
    })
    .AddEntityFrameworkStores<IdentityContext>()
    .AddDefaultTokenProviders();

What I have tried:

I just want for a start to get join table joined to a user object, but:

var q = userManager.Users.Include(x => x.UserRoles).ToList();

q.UserRoles count is zero.
I have tried everything what is available on the net, nothing works in my case. UserRoles join table has always zero roles. I have one user and one role, and user is assigned to this role.
Please help

P.S. I can see that

IdentityDbContext

already is doing all required initialisation in its

OnModelCreating

.
If I change:

public sealed class User : IdentityUser
{
    // public ICollection<UserRole> UserRoles { get; set; }
    public ICollection<IdentityUserRole<string>> UserRoles { get; set; }

}

Then here:

<pre>var q = userManager.Users.Include(x => x.UserRoles).ToList();

I have UserRoles object, which has one item. But I cannot do further includes to get actual Role object.