Block disabled users from logging in

app/controllers/application_controller.rb

@@ -39,6 +39,7 @@ class ApplicationController < ActionController::Base
   include Spree::Core::ControllerHelpers::Common
 
   before_action :set_cache_headers # prevent cart emptying via cache when using back button #1213
+  before_action :check_disabled_user, if: :spree_user_signed_in?
   before_action :set_after_login_url
 
   include RawParams
@@ -159,6 +160,14 @@ class ApplicationController < ActionController::Base
     response.headers["Pragma"] = "no-cache"
     response.headers["Expires"] = "Fri, 01 Jan 1990 00:00:00 GMT"
   end
+
+  def check_disabled_user
+    return unless current_spree_user.disabled?
+
+    flash[:success] = nil
+    flash.now[:error] = I18n.t("devise.failure.disabled")
+    sign_out current_spree_user
+  end
 end
 
 require 'spree/i18n/initializer'

config/locales/en.yml

@@ -207,6 +207,9 @@ en:
         signed_up_but_unconfirmed: "A message with a confirmation link has been sent to your email address. Please open the link to activate your account."
         unknown_error: "Something went wrong while creating your account. Check your email address and try again."
     failure:
+      disabled: |
+        Your account has been disabled.
+        Please contact an adminsitrator to solve this issue.
       invalid: |
         Invalid email or password.
         Were you a guest last time?  Perhaps you need to create an account or reset your password.