It uses the Slack API to determine which files are available to delete. Slack Deletron is an open source tool developed by Toronto-based developer Drew Minns.
If the user does not have access to the channel or the channel does not exist, users will be presented with a HTTP 404 page. When a channel is private or otherwise privileged, the logged in user must be a member of that conversation. We'll handle addressing permissions however you present the request. Send users to a specific channel or conversation, whether you know it only by name or have its authentic ID. If your app is installed, users will be sent directly to a conversation with your bot user or workspace app. If your app is not marked for distribution and not yet installed, users will be sent to the app directory. If your app is marked for distribution but not installed yet, users will be directed to your app's profile in the App Directory. Use the method to obtain the ID of the workspace your app is currently installed in. It can also be found while managing your app by inspecting the URL and looking for the alphanumeric ID beginning with A, like A123456. Find your Slack app's ID by preserving the app_id field received when using oauth.token. If invalid, users will be sent to the App Directory instead.