gwms/GWMS.Data/RoleConfiguration.cs

using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata.Builders;

namespace GWMS.Data
{
    public class RoleConfiguration : IEntityTypeConfiguration<IdentityRole>
    {
        #region Public Methods

        public void Configure(EntityTypeBuilder<IdentityRole> builder)
        {
            builder.HasData(
                new IdentityRole { Name = "Undef", NormalizedName = "UNDEF" },
                new IdentityRole { Name = "ExtUser", NormalizedName = "EXTUSER" },
                new IdentityRole { Name = "ExtTransp", NormalizedName = "EXTTRANSP" },
                new IdentityRole { Name = "User", NormalizedName = "USER" },
                new IdentityRole { Name = "Admin", NormalizedName = "ADMIN" },
                new IdentityRole { Name = "SuperAdmin", NormalizedName = "SUPERADMIN" }
            );
        }

        #endregion Public Methods
    }
}