You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: 20201014105103_backfill_add_biography_to_users.rb
    path of file: ./repos/open-build-service/src/api/db/migrate
    
    the code of the file until where you have to start completion: class Bac
    
  def up
    User.unscoped.in_batches do |relation|
      # rubocop:disable Rails/SkipsModelValidations
      relation.update_all biography: ''
      # rubocop:enable Rails/SkipsModelValidations
      sleep(0.01) # throttle
    end
  end