```ruby
class Token < ActiveRecord::Base
  belongs_to :user

  validates :name, :secret, presence: true
  validate :secret_is_valid

  before_validation :normalize_secret

  scope :by_created_at, -> { order(:created_at) }

  def code
    ROTP::TOTP.new(secret).now
  end

  private

  def secret_is_valid
    code
  rescue
    errors.add :secret, "is not a valid base32 secret"
  end

  def normalize_secret
    secret && secret.gsub!(" ", "")
  end
end
```

Rename method to reveal intent
user
```ruby
class Token < ActiveRecord::Base
  belongs_to :user

  validates :name, :secret, presence: true
  validate :secret_is_valid_base32

  before_validation :normalize_secret

  scope :by_created_at, -> { order(:created_at) }

  def code
    ROTP::TOTP.new(secret).now
  end

  private

  def secret_is_valid_base32
    code
  rescue
    errors.add :secret, "is not a valid base32 secret"
  end

  def normalize_secret
    secret && secret.gsub!(" ", "")
  end
end
```
assistant