uuid and password are needed for uploading Signal stickers.
(Note: If you don’t want to do this, you can still upload stickers manually by Signal Desktop)
You can get them easily with Generate button (In GUI) or --signal-get-auth (In CLI)
Since v2.7.0, you can get Signal uuid and password from non-beta version of Signal.

View -> Toggle Developers toolsallow pasting and press enter firstuuid is the output of running: window.SignalDebug.getReduxState().items.uuid_idpassword is the output of running: window.SignalDebug.getReduxState().items.password--enable-dev-toolsView -> Toggle Developers toolsallow pasting and press enter firstuuid is the output of running: window.reduxStore.getState().items.uuid_idpassword is the output of running: window.reduxStore.getState().items.passwordhttps://github.com/signalstickers/signalstickers-client/assets/7778898/ca3f1fec-e908-49d9-88a8-e33d0ee9a453
Reference