How can I implement two-factor authentication in my Rails app using Devise?

How can I implement two-factor authentication in my Rails app using Devise?

To implement two-factor authentication with Devise, you can use the 'devise-two-factor' gem. First, add it to your Gemfile.

What are the steps after adding the gem?

After adding the gem, run bundle install, then generate the necessary migration with rails generate devise_two_factor:install.

Do I need to modify any models?

Yes, you need to add :two_factor_authenticatable to your User model and run the migration to update the database.

How do users set up their two-factor authentication?

Users can set up two-factor authentication by enabling it in their account settings and linking their phone number for SMS or using an authenticator app.