ADD db schema in models

app/models/verification_code.rb

@@ -1,3 +1,22 @@
+# == Schema Information
+#
+# Table name: verification_codes
+#
+#  id         :integer          not null, primary key
+#  code       :string(255)
+#  code_type  :integer
+#  status     :integer
+#  phone      :string(255)
+#  email      :string(255)
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#
+# Indexes
+#
+#  by_email  (email)
+#  by_phone  (phone)
+#
+
 class VerificationCode < ApplicationRecord
   def effective?
     created_at + 10.minute > Time.current