fix table name

app/models/customer.rb

@@ -2,14 +2,12 @@
 
 module DiscoursePatrons
   class Customer < ActiveRecord::Base
+    self.table_name = "discourse_subscriptions_customers"
+
     scope :find_user, ->(user) { find_by_user_id(user.id) }
 
-    class << self
-      table_name = "discourse_subscriptions_customers"
-
-      def create_customer(user, customer)
-        create(customer_id: customer[:id], user_id: user.id)
-      end
+    def self.create_customer(user, customer)
+      create(customer_id: customer[:id], user_id: user.id)
     end
   end
 end