sendInvitationRequest method
Implementation
Future<void> sendInvitationRequest({
required String? username,
required String? reason,
String? appKey,
}) async {
await _channel.invokeMethod(
'sendInvitationRequest',
{
'username': username,
'reason': reason,
'appKey': appKey,
}..removeWhere((key, value) => value == null));
return;
}