[Solved] Zapier OAuth Integration Suddenly Failing with Bad Client_id

@eric

You know, I did that before posting this but instead of deleting and re-creating my OAuth app, I just added a new one and tried that client/id. For some reason this time it worked and here's the exact steps I did:

1. Delete All OAuth apps (I only had Zapier).
2. Turn Off OAuth applications
3. $ docker-compose stop
4. $ service docker restart
5. $ docker-compose up -d
6. Turn on OAuth applications
7. Create a single OAuth following the instructions (note: the screenshot conflicts with the text on that page. I set "Is Trusted" to No)
8. Reconnect my Mattermost account on Zapier using the new client id and token.
9. Click "Allow" when asked to trust Zapier.
10. Success!

Thanks @eric.