Move user db creation to service

app/controllers/signup_controller.rb

@@ -94,14 +94,15 @@ class SignupController < ApplicationController
   end
 
   def complete_signup
-    @user.save!
     session[:new_user] = nil
     session[:validation_error] = nil
 
     CreateAccount.call(
       username: @user.cn,
+      domain: "kosmos.org",
       email: @user.email,
-      password: @user.password
+      password: @user.password,
+      invitation: @invitation
     )
 
     @invitation.update! invited_user_id: @user.id, used_at: DateTime.now

app/services/create_account.rb

@@ -1,16 +1,29 @@
 class CreateAccount < ApplicationService
   def initialize(args)
-    @username = args[:username]
-    @email = args[:email]
-    @password = args[:password]
+    @username   = args[:username]
+    @domain     = args[:ou] || "kosmos.org"
+    @email      = args[:email]
+    @password   = args[:password]
+    @invitation = args[:invitation]
   end
 
   def call
+    create_user_in_database
     add_ldap_document
   end
 
   private
 
+  def create_user_in_database
+    User.create!(
+      cn: @username,
+      ou: @domain,
+      email: @email,
+      password: @password,
+      password_confirmation: @password
+    )
+  end
+
   def add_ldap_document
     dn = "cn=#{@username},ou=kosmos.org,cn=users,dc=kosmos,dc=org"
     attr = {