utility.lookupinvite: add recipients field if gdm has name

src/modules/utility.js

@@ -565,6 +565,7 @@ lookupinvite.callback = async function (msg, line) {
     } else if (invite.type == 1) {
       embed.title += " (Group DM)";
       embed.fields.push(
+        ...[
           {
             name: "Channel",
             value: `**${
@@ -580,8 +581,16 @@ lookupinvite.callback = async function (msg, line) {
             value: `${STATUS_ICONS.offline}${invite.approximate_member_count} members`,
             inline: true,
           },
+          invite.channel.name == null && {
+            name: "Recipients",
+            value: invite.channel.recipients
+              .map((member) => member.username)
+              .join(", "),
+            inline: false,
+          },
           expires,
-        inviter
+          inviter,
+        ].filter((x) => !!x)
       );
 
       const groupIcon = invite.channel.icon