Pull Event RSVP list via Data Explorer

I was able to plug away at the following with the bot, but it is returning 0 results (even though I can see 30+ people have responded. The query works if I remove the WHERE statement.

-- [params]
-- text :event_url = 'https://developer.sailpoint.com/discuss/t/deploying-the-beyondtrust-password-safe-connector-for-identityiq-with-michel-bluteau/68228'

SELECT 
    users.username AS "Username",
    invitees.status AS "RSVP Status",
    invitees.updated_at AS "Last Updated"
FROM 
    discourse_post_event_events AS events
JOIN 
    discourse_post_event_invitees AS invitees
ON 
    events.id = invitees.post_id
JOIN 
    users
ON 
    invitees.user_id = users.id
WHERE 
    events.url = :event_url