<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=23479) </details> <!--IssueSummary end--> ### Problem to solve In the UI interface, Slack integration service has a "Confidential note channel name" parameter. But there is no such parameter in the [Slack service API](https://docs.gitlab.com/ce/api/services.html#slack-notifications), so there is no way to set this field through the API. This issue may also be relevant to other services, like Mattermost. ### Proposal Add `confidential_note_channel` option to [Create/Edit Slack service](https://docs.gitlab.com/ce/api/services.html#create-edit-slack-service) API. Document it. ### Links / references - [Services API | GitLab](https://docs.gitlab.com/ee/api/services.html)