add 2FA

db/migrate/20230915200635_add_devise_two_factor_to_users.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class AddDeviseTwoFactorToUsers < ActiveRecord::Migration[7.0]
+  def change
+    add_column :users, :otp_secret, :string
+    add_column :users, :consumed_timestep, :integer
+    add_column :users, :otp_required_for_login, :boolean, default: false, null: false
+  end
+end