<!--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=428790) </details> <!--IssueSummary end--> <!-- This template is a great use for issues that are feature::additions or technical tasks for larger issues.--> ### Proposal <!-- Use this section to explain the feature and how it will work. It can be helpful to add technical details, design proposals, and links to related epics or issues. --> Provide support for [GovSlack](https://slack.com/intl/en-gb/blog/news/govslack-secure-compliant-government-work#:~:text=With%20GovSlack%2C%20government%20agencies%20and,and%20compliance%20at%20the%20forefront.) when users are trying to integrate the `Gitlab for Slack App`. Currently there is a hardcoded url in the request for authorization in Gitlab. See: https://gitlab.com/gitlab-org/gitlab/-/blame/master/app/services/projects/slack_application_install_service.rb#L9-L13 <!-- Consider adding related issues and epics to this issue. You can also reference the Feature Proposal Template (https://gitlab.com/gitlab-org/gitlab/-/blob/master/.gitlab/issue_templates/Feature%20proposal%20-%20detailed.md) for additional details to consider adding to this issue. Additionally, as a data oriented organization, when your feature exits planning breakdown, consider adding the `What does success look like, and how can we measure that?` section. --> I did not find any issues related to this and I tried to change the url after the button is clicked to add the app to a project. It seemed to have worked at the instance level but not at the project level. If this is not a feature that is possible can the documentation provide that information and if a workaround is possible note that as well? <!-- Label reminders Use the following resources to find the appropriate labels: - Use only one tier label choosing the lowest tier this is intended for - https://gitlab.com/gitlab-org/gitlab/-/labels - https://about.gitlab.com/handbook/product/categories/features/ -->