GRN2-6: Notify admins when a approve/invite user signs up (#538)

* Notify admins when a approve/invite user signs up

* Fix formating

* Uses admins_url variable

app/controllers/sessions_controller.rb

@@ -18,6 +18,7 @@
 
 class SessionsController < ApplicationController
   include Registrar
+  include Emailer
 
   skip_before_action :verify_authenticity_token, only: [:omniauth, :fail]
 
@@ -58,9 +59,16 @@ class SessionsController < ApplicationController
       # Add pending role if approval method and is a new user
       if approval_registration && !@user_exists
         user.add_role :pending
+
+        # Inform admins that a user signed up if emails are turned on
+        send_approval_user_signup_email(user) if Rails.configuration.enable_email_verification
+
         return redirect_to root_path, flash: { success: I18n.t("registration.approval.signup") }
       end
 
+      send_invite_user_signup_email(user) if Rails.configuration.enable_email_verification &&
+                                             invite_registration && !@user_exists
+
       login(user)
     rescue => e
         logger.error "Error authenticating via omniauth: #{e}"