1class CreateAuthentications < ActiveRecord::Migration
 2  def self.up
 3    create_table :authentications do |t|
 4      t.integer :user_id
 5      t.string :provider
 6      t.string :uid
 7
 8      t.timestamps
 9    end
10  end
11
12  def self.down
13    drop_table :authentications
14  end
15end