This article explains how you can securely share your channel with someone without having to invite them to your channel.
Note: The option to share via Secure Link will only show up if the channel is private. If the channel is public, then you can only share it using the regular link. If the channel is not set as public and the 'Private' checkbox is not checked, then it will inherit the workspace privacy. If the workspace is set as private then the channel will also be treated as a private channel and the option to share via secure link will appear. For example, a workspace is public but you create a channel with the "private" privacy setting (as shown below) and you don't add the "public" user in the users, then the secure share will be visible because the channel is private even though the workspace is public.
