Updaded api user return data

app/controllers/repp/v1/accounts_controller.rb

@@ -143,7 +143,7 @@ module Repp
         arr = []
         users.each do |u|
           arr << { id: u.id, username: u.username,
-                   role: u.roles.first }
+                   role: u.roles.first, registrar_name: u.registrar.name }
         end
 
         arr

app/controllers/repp/v1/domains/admin_contacts_controller.rb

@@ -7,7 +7,7 @@ module Repp
 
           unless @new_contact.identical_to?(@current_contact)
             @epp_errors.add(:epp_errors,
-                            msg: 'Admin contacts must be identical',
+                            msg: 'New and current admin contacts ident data must be identical',
                             code: '2304')
           end