asp.net core 2, identity w/windows authentication but database managed roles

Question

I have a custom IClaimsTransformation thanks to @jim-karnopp. All appears to work fine aside from when I try to add a user to the database that doesn't already exist.

var user = identity.Name

AppUser newuser = new AppUser()
            {
                UserName =  user,
                EmailConfirmed = false,
                PhoneNumberConfirmed = false,
                TwoFactorEnabled = false,
                LockoutEnabled = false,
                AccessFailedCount = 0
            };

            var createUser = await _userManager.CreateAsync(newuser);

Is there a better way to add a windows authenticated user to the identity database? I'm receiving a 'InvalidUserName' "can only contain letters and digits" error currently. Because identity.name equals DOMAIN\\username

Is there a way to store the windows authenticated username in the identity db?

Thank you

Answer 1

Configure the username validator to allow .

services.AddIdentity<ApplicationUser, IdentityRole>(options => {
    options.User.AllowedUserNameCharacters = "allowed characters here";
});