I used rahul's `testingthings` channel for testing this. I created a webhook event by tagging myself with `#createathread`. I then copied this webhook event and used it to trigger the responder.
On staging, I created a dummy user with rahul's fid as well as a dummy user with my fid. In triggering the responder with `AUTHORITATIVE_FARCASTER_BOT` set to true, confirmed that the community was created with rahul set to admin.
Reset everything to prior and ensured that if rahul's fid didn't exist on staging identity, retriggering the responder resulted in the same community but with the tagger (my fid) as the admin.
Verified community creation through iOS simulator. Properly set as tagged to farcaster `testingthings` channel
Retriggered responder to verify that it then picked up on the community already existing and returning the proper community threadID.
Depends on D13774