When I use LINE Watch Events, I can get user id of message but there is no user id in the gettable items.
LINE is providing webAPI to get user info (Messaging APIリファレンス | LINE Developers)
How can I use this webAPI to convert the user id item?
The response comes back as json.
Self resolved!
I had a module available that could do exactly what I wanted to do with the LINE module.
Hello @Manusa welcome to the community 
First of all, awesome that you managed to figure this out, great job! Second of all, thanks a lot for circling back to the topic and posting your solution here so that we can all learn from what you’ve found out. We all truly appreciate that 
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