Preparing Models for an API (How to setup relationships)

public class Comment(string name, string content)
{
    public Guid Id { get; set; } = Guid.NewGuid();

    public string Name { get; set; } = name;
    public string Content { get; set; } = content;

    public DateTime CreatedAt { get; set; } = DateTime.Now;
    public DateTime UpdatedAt { get; set; } = DateTime.Now;

    public User? User { get; set; }
    public Post? Post { get; set; }
}