Slack.Web.Usergroups.create
You're seeing just the function
create, go back to Slack.Web.Usergroups module for more information.
Create a user group
Required Params
name- A name for the user group. Must be unique among user groups. ex:My Test Team
Optional Params
channels- A comma separated string of encoded channel IDs for which the user group uses as a default.description- A short description of the user group.handle- A mention handle. Must be unique among channels, users and user groups.include_count- Include the number of users in each user group. ex:1