def activate
    # debugger
    logout_keeping_session!

    @user = User.find_using_perishable_token(params[:activation_code], 1.week) || (raise Exception)
    # raise Exception if @user.active?

    if (!params[:activation_code].blank?) && @user && !@user.active? && @user.activate!
      flash[:notice] = t('flash.users.activated')
      UserSession.create(@user, false) # Log user in manually
      Notifier.user_creation_welcome(@user).deliver
      redirect_to user_path(@user)
    elsif params[:activation_code].blank?
      flash[:error] = t('flash.users.blank_code')
      redirect_back_or_default(root_path)
    else
      flash[:error]  = t('flash.users.missing_code')
      render :action => :new
    end
  end