toJson method
Implementation
Map<String, Object?> toJson() => {
'user_id': userid,
'presence': presence.name,
if (lastActiveTimestamp != null)
'last_active_timestamp': lastActiveTimestamp?.millisecondsSinceEpoch,
if (statusMsg != null) 'status_msg': statusMsg,
if (currentlyActive != null) 'currently_active': currentlyActive,
};