Our team was trying out Slack for a month and I added the Slack app to Google Hangouts, apparently. Now when I enter a hangout I see this sidebar:  Since I stopped using Slack, I've tried removing the app with this button on the right sidebar: And I get this prompt:But the next time I start up a Hangout, the sidebar is back. I found Google's Add or remove an app in Hangouts, but it doesn't actually say how to remove apps. We are using Google Apps for Work. Do I need to contact an SA to fix this or can I do it on my own?(Note to developers: can we agree to stop overloading the term app now?)
How do I permanently remove an application from Google Hangouts?
google apps;google hangouts;slack
Complete the following steps to completely remove the Slack/Hangouts integration.Go to your Slack URL for service integrations:https://.slack.com/servicesUnder Google+ Hangouts click the hyperlinked  Easy creation of...On the left side click Remove IntegrationClick OK on the popupClose SlackGo to https://security.google.com/settings/security/permissionsRevoke Slack's permissions to access HangoutsNote: Each Slack/Google user that setup and authorized the integration will need to complete these steps.