Set event as parameter for Callback

Author: jyoung488

app/controllers/callbacks_controller.rb

@@ -1,5 +1,5 @@
 class CallbacksController < ApplicationController
   def index
-    @response = response
+    @event = params["json"]
   end
 end

app/views/callbacks/index.html.erb

@@ -1,5 +1,5 @@
 Hello API event received
 
 <div class="response-data">
-  <%= @response %>
+  <%= @event %>
 </div>