README.md in multitenant-0.4.1 vs README.md in multitenant-1.0.0

@@ -9,9 +9,12 @@
 
 ```ruby
 class User < ActiveRecord::Base
   belongs_to :tenant
   belongs_to_multitenant
+  
+  validates :email, uniqueness: true                    # application-wide uniqueness
+  validates :alias, uniqueness: { scope: :tenant_id }   # tenant-wide uniqueness
 end
 
 Multitenant.with_tenant current_tenant do
   # queries within this block are automatically
   # scoped to the current tenant