in db/migrate/20121101091638_devise_create_users.rb [1:45]
def change
create_table(:users) do |t|
t.string :email, :null => false, :default => ""
t.string :encrypted_password, :null => false, :default => ""
t.string :reset_password_token
t.datetime :reset_password_sent_at
t.datetime :remember_created_at
t.integer :sign_in_count, :default => 0
t.datetime :current_sign_in_at
t.datetime :last_sign_in_at
t.string :current_sign_in_ip
t.string :last_sign_in_ip
t.timestamps
end
add_index :users, :email, :unique => true
add_index :users, :reset_password_token, :unique => true
end