SlackAPI

--Api Slack
os.loadAPI("json")

function getUserName(userId)
  src=http.get("https://slack.com/api/users.info?token=xoxb-98445457363-RuBmedToi74xaAZxHK2X5RXg&user="..userId.."&pretty=1").readAll()
  t=json.decode(src)

  if not(t.ok) then
    return
  else
    return t.user.name
  end
end

function getLastMessage(channel)
  channel = channel or "C2T0N7H7S"
  src=http.get("https://slack.com/api/channels.history?token=xoxb-98445457363-RuBmedToi74xaAZxHK2X5RXg&channel="..channel.."&pretty=1").readAll()
  t=json.decode(src)

  if not(t.ok) then
    return nil
  else
    user = t["messages"][1]["user"]
    if user==nil then
      user = t["messages"][1]["username"]
    end
    return t["messages"][1]["text"],user
  end
end