How do I map two objects when one object has no id

Question

problem I have a dto and a main class with id and I made another dto without id. I don't want the id to be displayed on swagger

Service Layer

 public async Task<SuperHeroDto> Create(SuperHeroDto dto) // class with id
    {
        var model = _mapper.Map<SuperHero>(dto); //Main class with id
        _demoAPIDbContext.SuperHeroes.Add(model);
        var saveChange = await _demoAPIDbContext.SaveChangesAsync();
        return _mapper.Map(model, dto);
    }

Question, how can I map the class that has no id?

The attributes of the 3 classes are all the same, only one has no id

 public class CreateSuperHeroDTO
{
    public string Name { get; set; }
    public string FirtstName { get; set; }
    public string LastName { get; set; }
    public string Place { get; set; }
}

Answer 1

If you don't want the Id to be displayed just add [JsonIgnore] annotation one line before the property Id.

[JsonIgnore]
public Guid Id { get; set; }