fix edge case where res.respond would not work, misc comments

website/src/controllers/api-v3/challenges.js

@@ -146,6 +146,7 @@ api.getChallenge = {
     let challenge = await Challenge.findOne({_id: challengeId}).exec(); // TODO populate
 
     // If the challenge does not exist, or if it exists but user is not a member, not the leader and not an admin -> throw error
+    // TODO support challenges in groups I'm a member of
     if (!challenge || (user.challenges.indexOf(challengeId) === -1 && challenge.leader !== user._id && !user.contributor.admin)) { // eslint-disable-line no-extra-parens
       throw new NotFound(res.t('challengeNotFound'));
     }

website/src/controllers/api-v3/groups.js

@@ -100,13 +100,13 @@ api.getGroups = {
             type: 'guild',
             privacy: 'private',
             _id: {$in: user.guilds},
-          }).select(groupFields).sort(sort).exec()); // TODO isMember
+          }).select(groupFields).sort(sort).exec());
           break;
         case 'publicGuilds':
           queries.push(Group.find({
             type: 'guild',
             privacy: 'public',
-          }).select(groupFields).sort(sort).exec()); // TODO use lean? isMember
+          }).select(groupFields).sort(sort).exec()); // TODO use lean?
           break;
         case 'tavern':
           queries.push(Group.getGroup(user, 'habitrpg', groupFields));