public override EncryptionKey DeleteKey(string walletId, string address, string keyId, IDbConnectorService dbservice)
        {
            EncryptionKey respkey = null;

            try
            {
                if (EconomyMainContext.Wallets.TryGetValue(walletId, out var wallet))
                {
                    if (wallet.Accounts.TryGetValue(address, out var account))
                    {
                        var key = account.AccountKeys.FirstOrDefault(k => k.Id.ToString() == keyId);
                        if (key != null)
                        {
                            respkey = key;
                            account.AccountKeys.Remove(key);
                        }
                        if (account.AccountKey != null)
                        {
                            if (account.AccountKey.Id.ToString() == keyId)
                            {
                                account.AccountKey = null;
                            }
                        }
                    }
                }

                if (EconomyMainContext.WorkWithDb)
                {
                    var k = dbservice.GetKey(new Guid(keyId));
                    if (k != null)
                    {
                        respkey = k;
                        dbservice.DeleteKey(keyId);
                    }
                }

                return(respkey);
            }
            catch (Exception ex)
            {
                log.Error("Cannot delete the key!", ex);
                throw new Exception($"Cannot delete the key!");
            }
        }