drinkrate/DrinkRateAPI/DbEntities/DbApplicationUser.cs

using DrinkRateAPI.Contexts;
using Microsoft.AspNetCore.Identity;
using Microsoft.Extensions.Options;

namespace DrinkRateAPI.DbEntities;

public class DbApplicationUser : IdentityUser<Guid>
{
    public virtual DbUserProfile UserProfile { get; set; }
}

public class UserWithProfileManager : UserManager<DbApplicationUser>
{
    private readonly ApplicationDbContext _context;

    public UserWithProfileManager(
        IUserStore<DbApplicationUser> store,
        IOptions<IdentityOptions> optionsAccessor,
        IPasswordHasher<DbApplicationUser> passwordHasher,
        IEnumerable<IUserValidator<DbApplicationUser>> userValidators,
        IEnumerable<IPasswordValidator<DbApplicationUser>> passwordValidators,
        ILookupNormalizer keyNormalizer,
        IdentityErrorDescriber errors,
        IServiceProvider services,
        ILogger<UserManager<DbApplicationUser>> logger,
        ApplicationDbContext context)
        : base(store, optionsAccessor, passwordHasher, userValidators,
            passwordValidators, keyNormalizer, errors, services, logger)
    {
        _context = context;
    }

    public override async Task<IdentityResult> CreateAsync(DbApplicationUser user, string password)
    {
        var result = await base.CreateAsync(user, password);
        if (!result.Succeeded)
            return result;

        var newProfile = new DbUserProfile
        {
            ApplicationUser = user,
            UserName = $"User_{user.Id}",
            IsAdmin = false,
            IsDeleted = false
        };

        await _context.UserProfiles.AddAsync(newProfile);
        await _context.SaveChangesAsync();

        return result;
    }
}