About get the username about linebot HOT 4 CLOSED

@jacklee814 I've seen that sometimes too, and also cannot find any answer from their documentation. My guess is that those users haven't accepted the terms and conditions. They may use older version of LINE, or they may just chat to the bot without adding it as friend.

from linebot.

@jacklee814 You need to do that within the callback function. For example,

let username;
event.source.profile().then(function (profile) {
  username = profile.displayName;
  console.log(username);
});

from linebot.

Ok. thank you

btw do you know why some user displayName is 'undefined' ?, but some user was normal.

from linebot.

thanks for your reply.

from linebot.