if user.role? :user
      can :read, :all
      can :create, :all
      can :destroy, :all do |all|
        all.each { |m|

          m.try(:user) == user
          }
        all.each { |m| 3.minutes.ago <= m.created_at }
      end
      can :update, :all do |all|

        all.each { |m|
          debugger
          m.try(:user) == user
          }
         3.minutes.ago <= all.created_at
      end
    end