Adding e-mail confirmations

db/migrate/20161003142332_add_confirmable_to_users.rb

@@ -0,0 +1,9 @@
+class AddConfirmableToUsers < ActiveRecord::Migration[5.0]
+  def change
+    add_column :users, :confirmation_token, :string
+    add_column :users, :confirmed_at, :datetime
+    add_column :users, :confirmation_sent_at, :datetime
+    add_column :users, :unconfirmed_email, :string
+    add_index :users, :confirmation_token, unique: true
+  end
+end