Fix auth spec template

lib/generators/simple_controller/simple_controller_generator.rb

@@ -52,6 +52,10 @@ class SimpleControllerGenerator < Rails::Generators::NamedBase
     options.auth&.camelcase if options.auth.present?
   end
 
+  def auth_singular
+    options.auth
+  end
+
   def response_status action
     case action
     when 'get'

lib/generators/simple_controller/templates/specs/spec.rb.tt

@@ -18,7 +18,7 @@ RSpec.describe '<%= controller_path %>', type: :request, capture_examples: true,
 
   before :each do
 <% if auth.present? -%>
-    @<%= resource_singular %> = <%= auth %>.register "auth", "password"
+    @<%= auth_singular %> = <%= auth %>.register "auth", "password"
     @auth_token = <%= auth %>.login "auth", "password"
 <% end -%>
     @entity_count = 5