internal string Delete(int keepId, int vaultId, string userId)
        {
            VaultKeep exists = _repo.FindByIds(keepId, vaultId);

            if (exists == null)
            {
                throw new Exception("Invalid Id Combination");
            }
            else if (exists.UserId != userId)
            {
                throw new Exception("No tienes estes");
            }
            _repo.Delete(exists.Id);
            return("Successfully Deleted");
        }