如何在EF核心代码优先方法中将前台键添加到aspnetroles表中？

modelBuilder.Entity<AspNetRoles>()
    .HasKey(r => r.Id);

modelBuilder.Entity<AspNetRoles>()
    .Property(r => r.Name)
    .HasMaxLength(256);

modelBuilder.Entity<AspNetRoles>()
    .HasMany(r => r.Users)
    .WithMany(u => u.Roles)
    .UsingEntity<IdentityUserRole<string>>(
        j => j.HasOne(ur => ur.User)
            .WithMany(u => u.Roles)
            .HasForeignKey(ur => ur.UserId),
        j => j.HasOne(ur => ur.Role)
            .WithMany(r => r.Users)
            .HasForeignKey(ur => ur.RoleId),
        j =>
        {
            j.HasKey(ur => new { ur.UserId, ur.RoleId });
            j.ToTable("AspNetUserRoles");
        }
    );

modelBuilder.Entity<AspNetRoles>()
    .HasData(
        new AspNetRoles { Id = "1", Name = "Admin", NormalizedName = "ADMIN" },
        new AspNetRoles { Id = "2", Name = "User", NormalizedName = "USER" }
    );