User constructor
      
      User({ 
    
    
- required String userId,
- required String nickname,
- String profileUrl = '',
- UserConnectionStatus connectionStatus = UserConnectionStatus.notAvailable,
- int? lastSeenAt,
- bool? isActive = true,
- List<String> ? preferredLanguages,
- String friendDiscoveryKey = '',
- String friendName = '',
- Map<String, String> metaData = const {},
- bool requireAuth = false,
Implementation
User({
  required this.userId,
  required this.nickname,
  this.profileUrl = '',
  this.connectionStatus = UserConnectionStatus.notAvailable,
  this.lastSeenAt,
  this.isActive = true,
  this.preferredLanguages,
  this.friendDiscoveryKey = '',
  this.friendName = '',
  this.metaData = const {},
  this.requireAuth = false,
});