Represents a supergroup or channel with zero or more members (subscribers in the case of channels). From the point of view of the system, a channel is a special kind of a supergroup: only administrators can post and see the list of members, and posts from all administrators use the name and photo of the channel instead of individual names and profile photos. Unlike supergroups, channels can have an unlimited number of subscribers
date Point in time (Unix timestamp) when the current user joined, or the point in time when the supergroup or channel was created, in case the user is not a member
isBroadcastGroup True, if the supergroup is a broadcast group, i.e. only administrators can send messages and there is no limit on the number of members
memberCount Number of members in the supergroup or channel; 0 if unknown. Currently, it is guaranteed to be known only if the supergroup or channel was received through searchPublicChats, searchChatsNearby, getInactiveSupergroupChats, getSuitableDiscussionChats, getGroupsInCommon, or getUserPrivacySettingRules