HTTPS endpoint URL where events will be delivered. HTTP URLs are rejected. URLs resolving to private or internal IP addresses (localhost, 10.x.x.x, 172.16-31.x.x, 192.168.x.x, 169.254.x.x) are also rejected.
Array of event types to subscribe to. At least 1 required. Valid types: tweet.new, tweet.reply, tweet.quote, tweet.retweet, follower.gained, follower.lost.