WITAS, it's an acronym for Wait is that sticker, in a nutshell it generates stickers with Midjourney, the main flow works like this:

1. Enter your server id, channel id and authorization for Midjourney (optional)
2. Enter subject (optional)
3. Generate or enter prompt
4. Wait for the generation to finish (marvel at some sweet stickers in the meanwhile)
5. Pick your favorite sticker (or all 4) download them raw or get the optimized versions in email 10 minutes later