add cancan for authorization

app/controllers/dashboard_controller.rb

@@ -3,13 +3,29 @@
 class DashboardController < ApplicationController
   skip_before_action :authenticate_user!, only: %i[index]
 
+  before_action :maybe_redirect_product_url
+  before_action :maybe_render_landing
+
+  load_and_authorize_resource :template, parent: false
+
   def index
-    return redirect_to Docuseal::PRODUCT_URL, allow_other_host: true if Docuseal.multitenant? && !signed_in?
-    return render 'pages/landing' unless signed_in?
+    @templates = @templates.active.preload(:author).order(id: :desc)
+    @templates = Templates.search(@templates, params[:q])
 
-    templates = current_account.templates.active.preload(:author).order(id: :desc)
-    templates = Templates.search(templates, params[:q])
+    @pagy, @templates = pagy(@templates, items: 12)
+  end
 
-    @pagy, @templates = pagy(templates, items: 12)
+  private
+
+  def maybe_redirect_product_url
+    return if !Docuseal.multitenant? || signed_in?
+
+    redirect_to Docuseal::PRODUCT_URL, allow_other_host: true
+  end
+
+  def maybe_render_landing
+    return if signed_in?
+
+    render 'pages/landing'
   end
 end