Added ThreadChannel#addThreadMember

Author: jasonlessenich

src/main/java/net/javadiscord/javabot/systems/qotw/submissions/SubmissionManager.java

@@ -63,15 +63,16 @@ public WebhookMessageCreateAction<?> handleSubmission(@NotNull ButtonInteraction
 		config.getSubmissionChannel().createThreadChannel(
 				String.format(THREAD_NAME, questionNumber, member.getEffectiveName()), true).queue(
 				thread -> {
+					thread.addThreadMember(member).queue();
 					thread.getManager().setInvitable(false).setAutoArchiveDuration(ThreadChannel.AutoArchiveDuration.TIME_1_WEEK).queue();
-					try{
+					try {
 						QOTWSubmission submission = new QOTWSubmission();
 						submission.setThreadId(thread.getIdLong());
 						submission.setQuestionNumber(questionNumber);
 						submission.setGuildId(thread.getGuild().getIdLong());
 						submission.setAuthorId(member.getIdLong());
 						qotwSubmissionRepository.insert(submission);
-						asyncPool.execute(()->{
+						asyncPool.execute(() -> {
 							Optional<QOTWQuestion> questionOptional = questionQueueRepository.findByQuestionNumber(questionNumber);
 							if (questionOptional.isPresent()) {
 								thread.sendMessage(member.getAsMention())