app/controllers/sessions_controller.rb

@@ -79,8 +79,11 @@ class SessionsController < ApplicationController
     return switch_account_to_local(user) if !is_super_admin && auth_changed_to_local?(user)
 
     # Check correct password was entered
-    return redirect_to(signin_path, alert: I18n.t("invalid_credentials")) unless user.try(:authenticate,
-      session_params[:password])
+    unless user.try(:authenticate, session_params[:password])
+      logger.info "Support: #{session_params[:email]} login failed."
+      return redirect_to(signin_path, alert: I18n.t("invalid_credentials"))
+    end
+
     # Check that the user is not deleted
     return redirect_to root_path, flash: { alert: I18n.t("registration.banned.fail") } if user.deleted?
 

app/models/user.rb

@@ -238,7 +238,7 @@ class User < ApplicationRecord
   def check_domain
     if Rails.configuration.require_email_domain.any? && !email.end_with?(*Rails.configuration.require_email_domain)
       errors.add(:email, I18n.t("errors.messages.domain",
-        email_domain: Rails.configuration.require_email_domain.join('" ' + I18n.t("modal.login.or") + ' "')))
+        email_domain: Rails.configuration.require_email_domain.join("\" #{I18n.t('modal.login.or')} \"")))
     end
   end