Usage:

 ./ltse -token={YOUR-SLACK-TOKEN} -prefix={EMOJI-PREFIX} -id={LINE EMOJI ID}

For example, if you'd like to upload the emoji sticker:
https://store.line.me/emojishop/product/5e4f906cd8824d19066dfc58/en

The id would be 5e4f906cd8824d19066dfc58.

If your prefix is shiba_puppy, and the emoji code in Slack would be shiba_puppy_1, shiba_puppy_2...etc.