catch the error and render charge json

app/controllers/discourse_payments/charges_controller.rb

@@ -27,7 +27,7 @@ module DiscoursePayments
 
       # BadgeGranter.grant(badge, current_user)
 
-      render :json => { status: 'OK' }
+      render :json => charge
     end
   end
 end

assets/javascripts/discourse/components/stripe-card.js.es6

@@ -26,6 +26,8 @@ export default Ember.Component.extend({
 
           ajax('/charges', { data: data, method: 'post' }).then(data => {
             console.log(data);
+          }).catch(() => {
+            console.log('error');
           });
         }
       });