Seeding an identity database with a super user

Program.cs

CreateDatabase();
using (var scope = app.Services.CreateScope()) //Creates a new scope
{
    //Resolve ASP .NET Core Identity with DI help
    var roleManager = (RoleManager<IdentityRole>)scope.ServiceProvider.GetService<RoleManager<IdentityRole>>(); //gets services
    var userManager = (UserManager<IdentityUser>)scope.ServiceProvider.GetService<UserManager<IdentityUser>>();
    CreateRolesAsync(roleManager).Wait();
    CreateSuperUser(userManager).Wait();
}
//important that this is called after these
app.UseAuthentication();
app.UseAuthorization();
//rest of the app builder code
app.run()
//Rest of the code
void CreateDatabase() //Makes sure the database exists
{
    using (var serviceScope = app.Services.GetService<IServiceScopeFactory>().CreateScope())
    {
        var context = serviceScope.ServiceProvider.GetRequiredService<ApplicationDbContext>();
        context.Database.EnsureCreated();
    }
}

async Task CreateRolesAsync(RoleManager<IdentityRole> roleManager)
{
    string[] roleNames = { "Admin", "Member", "<<Secondary role>>" }; //All role names that will be inserted
    foreach (var roleName in roleNames)  // loops through all the the role names
    {
        var roleExist = await roleManager.RoleExistsAsync(roleName); // and makes roles if they are not there
        if (!roleExist)
        {
            await roleManager.CreateAsync(new IdentityRole(roleName));
       	}
    }
}
async Task CreateSuperUser(UserManager<IdentityUser> userManager) //Uses the scoped Manager
{
    var superUser = new IdentityUser { Email = "<<Email>>", UserName  = "<<Username>>", EmailConfirmed = true, };
    await userManager.CreateAsync(superUser, "<<Password>>");
    var token = await userManager.GenerateEmailConfirmationTokenAsync(superUser); //Only needed if Confirm email is on
    await userManager.ConfirmEmailAsync(superUser, token); //Auto confirms the email
    await userManager.AddToRoleAsync(superUser, "Admin"); //Adds the roles to the super user
    await userManager.AddToRoleAsync(superUser, "Member");
}