Configuring Models

The Devise method in your models also accepts some options to configure its modules. For example, you can choose the cost of the hashing algorithm with:

devise :database_authenticatable, :registerable, :confirmable, :recoverable, stretches: 12

Besides :stretches, you can define :pepper, :encryptor, :confirm_within, :remember_for, :timeout_in, :unlock_in among other options. For more details, see the initializer file that was created when you invoked the "devise:install" generator described above. This file is usually located at /config/initializers/devise.rb.