Mattermost connector for Bitbucket - Setup
Login Mattermost and create OAuth2 App . see the detail at https://docs.mattermost.com/developer/oauth-2-0-applications.html
Install "Mattermost connector for Bitbucket" in UPM
Click on "Configure" button
Register Mattermost app
Mattermost URL : e.g : http://192.168.64.2:30511/
Client ID
Client Secret
Register Redirect URI to Mattermost app
Redirect URI (Callback URLs) : e.g : http://localhost:7990/bitbucket/plugins/servlet/mattermost-authorization
Setup project notification
Navigate to project setting in Bitbucket
Click on "Mattermost integration" link
Click on "Connect" button
Click on "Allow"