NEWBIE using flickr_fu, impossible to retrieve a user's tags list

Rails
1

Retrieving images using tags : OK!
def index
flickr = Flickr.new(File.join(RAILS_ROOT, ‘config’, ‘flickr.yml’))
@photos = flickr.photos.search(:user_id => “12323423432@N05”, :tags
=> params[:tag], …
end

How can I retrieve my list of TAGS from flickr? What am I missing ?