public string DisconnectVaultAndKeep(int vaultId, int keepId)
        {
            var user = HttpContext.User;

            if (user.Identity.Name != null)
            {
                var sessionId = user.Identity.Name;
                var vaultKeep = new VaultKeep();
                vaultKeep.VaultId = vaultId;
                vaultKeep.KeepId  = keepId;
                vaultKeep.UserId  = sessionId;
                return(_repo.DisconnectVaultAndKeep(vaultKeep));
            }
            return(null);
        }