Update slackin to a1d3f9c5b7
diff --git a/lib/slack.js b/lib/slack.js
index 8bb43b3..ed8a55e 100755
--- a/lib/slack.js
+++ b/lib/slack.js
@@ -44,7 +44,7 @@
 
     // reset the list of channels
     this.channelsByName = {};
-    res.body.channels.forEach(channel => {
+    (res.body.channels || []).forEach(channel => {
       this.channelsByName[channel.name] = channel;
     });