Notify admins when a approval/invite user signs up

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]
 
@@ -49,18 +50,24 @@ class SessionsController < ApplicationController
     begin
       @auth = request.env['omniauth.auth']
       @user_exists = check_user_exists
-
+  
       # If using invitation registration method, make sure user is invited
       return redirect_to root_path, flash: { alert: I18n.t("registration.invite.no_invite") } unless passes_invite_reqs
-
+      
       user = User.from_omniauth(@auth)
 
       # 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}"