dotincave1.cs

// Cave
public partial class Cave
{
    [Key]
    public int Id { get; set; }
    [ForeignKey(nameof(Author))]
    public int AuthorId { get; set; }
    [ForeignKey(nameof(Map))]
    public int MapId { get; set; }
    [StringLength(50)]
    public string Name { get; set; }
    public DateTimeOffset DateCreated { get; set; }
    public long Duration { get; set; }
    public DeviceType DeviceOrigin { get; set; }
    public bool ShowJumpScare { get; set; }
    public double EndPointRadius { get; set; }

    // Unused
    public Map Map { get; set; }
    public virtual User Author { get; set; }
}

// User
public partial class User
{
    [Key]
    public int Id { get; set; }
    [StringLength(50)]
    public string DisplayName { get; set; }
    public UserType Type { get; set; }

    // Unused
    public virtual ICollection<Cave> Cave { get; set; }
}