utility.lookinvite: fix missing name and add member count

forgot to add with_counts to my test url so didnt realize fields were
there for those

src/modules/utility.js

@@ -514,7 +514,17 @@ lookupinvite.callback = async function (msg, line) {
       embed.fields.push(
         {
           name: "Channel",
-          value: `**${invite.channel.name}** (${invite.channel.id})`,
+          value: `**${
+            invite.channel.name ??
+            invite.channel.recipients
+              .map((member) => member.username)
+              .join(", ")
+          }** (${invite.channel.id})`,
+          inline: true,
+        },
+        {
+          name: "Member Count",
+          value: `${STATUS_ICONS.offline}${invite.approximate_member_count} members`,
           inline: true,
         },
         expires