Trigger system hook for user create event on Trial sign up

app/controllers/registrations_controller.rb

@@ -20,6 +20,7 @@ class RegistrationsController < Devise::RegistrationsController
 
     super do |new_user|
       persist_accepted_terms_if_required(new_user)
+      yield new_user if block_given?
     end
   rescue Gitlab::Access::AccessDeniedError
     redirect_to(new_user_session_path)

ee/app/controllers/trial_registrations_controller.rb

@@ -4,10 +4,16 @@ class TrialRegistrationsController < RegistrationsController
   before_action :check_if_gl_com
   before_action :check_if_improved_trials_enabled
 
+  def create
+    super do |new_user|
+      new_user.system_hook_service.execute_hooks_for(new_user, :create)
+    end
+  end
+
   private
 
   def sign_up_params
-    params.require(:user).permit(:first_name, :last_name, :username, :email, :password, :skip_confirmation)
+    params.require(:user).permit(:first_name, :last_name, :username, :email, :password, :skip_confirmation, :email_opted_in)
   end
 
   def resource

ee/spec/controllers/trial_registrations_controller_spec.rb

@@ -72,6 +72,14 @@ describe TrialRegistrationsController do
           expect(User.last.name).to eq("#{user_params[:first_name]} #{user_params[:last_name]}")
         end
       end
+
+      context 'system hook' do
+        it 'triggers user_create event on trial sign up' do
+          expect_any_instance_of(SystemHooksService).to receive(:execute_hooks_for).with(an_instance_of(User), :create)
+
+          post :create, params: { user: user_params }
+        end
+      end
     end
   end
 end