event subscription url verification failed #13
Description
When I add my ngrok url in api.slack.com for events subscription, the verification fails. Error:
DEBUG:slack_bolt.App:Applying slack_bolt.middleware.ssl_check.SslCheck
DEBUG:slack_bolt.App:Applying slack_bolt.middleware.request_verification.RequestVerification
DEBUG:slack_bolt.App:Applying slack_bolt.middleware.authorization.SingleTeamAuthorization
DEBUG:slack_bolt.App:Applying slack_bolt.middleware.ignoring_self_events.IgnoringSelfEvents
WARNING:slack_bolt.App:Unhandled request ({'token': '.....', 'challenge': '...', 'type': 'url_verification'})
127.0.0.1 - - [26/Jun/2020 12:55:41] "POST /slack/events HTTP/1.1" 404 -