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: 20190504131412_add_credits_count_to_users.rb
    path of file: ./repos/forem/db/migrate
    
    the code of the file until where you have to start completion: class AddCreditsCountToUsers < ActiveRecord::Migration[5.2]
  def self.up
    add_column :users, :credit
    
  def self.down
    remove_column :users, :credits_count
    remove_column :users, :spent_credits_count
    remove_column :users, :unspent_credits_count
    remove_column :users, :credits_count
    remove_column :users, :spent_credits_count
    remove_column :users, :unspent_credits_count
  end