=> Init(connection, dispatcher, streamName, logger, heartbeatFrequency, heartbeatTImeout, upperQueueBound : upperQueueBound, liveOnly : true);
=> Init(connection, dispatcher, streamName, logger, heartbeatFrequency, heartbeatTimeout, startingPosition, catchUpPageSize, upperQueueBound, maxLiveQueueSize);
await _conn.CreatePersistentSubscriptionAsync(streamName, groupName, settings, DefaultData.AdminCredentials);