Variable user​Membership

public let userMembership: User.Membership? 

If the request is made by an authenticated user, a UserMembership object is returned containing information about the user's access to the group. This includes the username of the calling user; the memberType, which specifies the type of membership the user has in the group (owner, member, admin, none); and the applications (number of requests to join the group) count available to administrators and owners.