To get a room id, you have to decode base64 of the url, which you got from https://apphub.webex.com/teams/applications/incoming-webhooks-cisco-systems.
1. connect webhooks with your webex teams via https://apphub.webex.com/teams/applications/incoming-webhooks-cisco-systems
2. at the bottom of the page, fill in "webhook name" and select your space. It will process an URL, which will look like this:
https://webexapis.com/v1/webhooks/incoming/Y2lzY29zcGFyazovL3VzL1dFQkhPT0svMTExMTExMTEtMjIyMi0zMzMzL...
3. take the last part "Y2lzY29zcGFyazovL3VzL1dFQkhPT0svMTExMTExMTEtMjIyMi0zMzMzLTQ0NDQtNTU1NTU1NTU1NTU1" and decode it with base64 for example https://www.base64decode.org/
4 decoded string will look like
ciscospark://us/WEBHOOK/11111111-2222-3333-4444-555555555555
5 "11111111-2222-3333-4444-555555555555" is the room ID.
I still try to figure out how to get Bearer Token, but to my knowledge it's not required anymore. Leaving the Wearer Token field empty doesn't make the addon work anyway.
