unsubscribeAll method
取消所以订阅的用户
Implementation
Future<NIMResult<void>> unsubscribeAll() async {
_loginStatusSubscription?.cancel();
if (_subscriptionUsers.isEmpty) {
return NIMResult.success();
}
final option =
NIMUnsubscribeUserStatusOption(accountIds: subscriptionUsers);
return await NimCore.instance.subscriptionService
.unsubscribeUserStatus(option);
}