Add a bit more info into the example plugin.

docs/example-plugins/directAPIcall.py

@@ -1,5 +1,11 @@
 from __future__ import unicode_literals
 from client import slack_client as sc
 
+
+def process_message(data):
+    '''If a user passes 'print users' in a message, print the users in the slack
+    team to the console. (Don't run this in production probably)'''
+
+    if 'print users' in data['text']:
         for user in sc.api_call("users.list")["members"]:
             print(user["name"], user["id"])