By enabling Authenticator app, You will be asked to enter the verification code exhibited within the authenticator application when logging in. To utilize this selection, you'll want to create the authenticator application beforehand. 為何要做個簡單修改卻沒辦法存檔，加入好友的自動回覆部分，修改完所需要內容，都存檔了卻返回一直告知尚未完成部分將刪除，按了存檔依然沒有，所以編輯都沒辦法存... https://clayton5788b.thenerdsblog.com/41869396/helping-the-others-realize-the-advantages-of-line-official-account