✅ ForeignKey Entity Framework and Identity

        [Key]
        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
        public Guid? PostId { get; set; }

        public List<Tag> Tags { get; set; }

        public List<Image> AttachedImages { get; set; }

        [ForeignKey("Account")]
        public Guid? OriginalPosterId { get; set; }
        public Account? OriginalPoster { get; set; }

        [ForeignKey("Account")]
        public List<Guid> PostParticipantsIds { get; set; }
        public virtual ICollection<Account> PostParticipants { get; set; }

        [ForeignKey("Account")]
        public List<Guid> UsersAttendingIds { get; set; }
        public virtual ICollection<Account> UsersAttending { get; set; }