Defer creating all users on connection.

.travis.yml

@@ -1,6 +1,8 @@
 language: ruby
 rvm:
   - 2.0.0
+  - 2.1.5
+  - 2.2.1
 script: bundle exec rake
 before_install:
   - gem update --system

lib/lita/adapters/slack/rtm_connection.rb

@@ -25,8 +25,7 @@ def initialize(robot, config, team_data)
           @im_mapping = IMMapping.new(API.new(config), team_data.ims)
           @websocket_url = team_data.websocket_url
           @robot_id = team_data.self.id
-
-          UserCreator.create_users(team_data.users, robot, robot_id)
+          @slack_users = team_data.users
         end
 
         def im_for(user_id)
@@ -50,6 +49,10 @@ def run(queue = nil, options = {})
             end
             websocket.on(:error) { |event| log.debug("WebSocket error: #{event.message}") }
 
+            EventLoop.defer do
+              UserCreator.create_users(slack_users, robot, robot_id)
+            end
+
             queue << websocket if queue
           end
         end
@@ -77,6 +80,7 @@ def shut_down
         attr_reader :robot_id
         attr_reader :websocket
         attr_reader :websocket_url
+        attr_reader :slack_users
 
         def log
           Lita.logger

spec/lita/adapters/slack/rtm_connection_spec.rb

@@ -41,12 +41,6 @@ def with_websocket(subject, queue)
     it "constructs a new RTMConnection with the results of rtm.start data" do
       expect(described_class.build(robot, config)).to be_an_instance_of(described_class)
     end
-
-    it "creates users with the results of rtm.start data" do
-      expect(Lita::Adapters::Slack::UserCreator).to receive(:create_users)
-
-      described_class.build(robot, config)
-    end
   end
 
   describe "#im_for" do
@@ -89,6 +83,13 @@ def with_websocket(subject, queue)
       end
     end
 
+    it "creates users with the results of rtm.start data" do
+      allow(Lita::Adapters::Slack::EventLoop).to receive(:defer).and_yield
+      expect(Lita::Adapters::Slack::UserCreator).to receive(:create_users)
+
+      subject.run(queue, ping: nil)
+    end
+
     it "dispatches incoming data to MessageHandler" do
       allow(Lita::Adapters::Slack::EventLoop).to receive(:defer).and_yield
       allow(Lita::Adapters::Slack::MessageHandler).to receive(:new).with(